Movies to Watch Before Avengers: Doomsday: Where Should You Start?
Avengers: Doomsday is no longer simply another Avengers sequel. Marvel Studios is positioning the film as one of the biggest crossover events in the history of the Marvel Cinematic Universe, bringing together characters and storylines that have developed across the MCU, the Fox X-Men universe and the Fantastic Four mythology.
That makes finding the right movies to watch before Avengers: Doomsday considerably more complicated than simply rewatching the previous Avengers films.
The good news is that you absolutely do not need to watch the entire MCU again. If you are searching for the movies to watch before Avengers: Doomsday, the key is not watching every Marvel project ever released. The smartest approach is to focus on the stories that directly establish the multiverse, the New Avengers, the Fantastic Four and the returning X-Men characters.
The better approach is to understand the major storylines that are converging in Avengers: Doomsday: the Avengers’ fractured legacy, the multiverse, the TVA, the arrival of the Fantastic Four, the integration of Fox’s X-Men characters, the formation of the New Avengers and the emergence of Robert Downey Jr.’s Doctor Doom.
Marvel’s current promotional material and recent industry coverage make the scale of that crossover increasingly clear. Avengers: Doomsday is scheduled for December 18, 2026, and its enormous ensemble includes MCU heroes alongside Fantastic Four characters and returning X-Men actors.
So, if you are searching for the best movies to watch before Avengers: Doomsday, this guide separates the genuinely important titles from the projects that are interesting but unnecessary.
The Short Answer: The Most Important Movies to Watch Before Avengers: Doomsday
If you are short on time, prioritize these:
- Captain America: Civil War
- Avengers: Infinity War
- Avengers: Endgame
- Spider-Man: No Way Home
- Doctor Strange in the Multiverse of Madness
- Deadpool & Wolverine
- Captain America: Brave New World
- Thunderbolts*
- The Fantastic Four: First Steps
And although this article focuses primarily on movies, there is one television series you should absolutely make room for:
Loki — Seasons 1 and 2
The reason Loki matters so much is that the series fundamentally changes how the MCU’s timelines and multiverse work. Current watch guides consistently place Loki among the most important preparation for Avengers: Doomsday.
If you have additional time, the original X-Men movies become increasingly valuable because Avengers: Doomsday is bringing several of those legacy characters back. This movies to watch before Avengers: Doomsday list is divided into essential viewing and optional viewing, so you can build a Marvel marathon according to the amount of time you have.
Now let’s break down exactly why each title matters.
1. Captain America: Civil War
If you want to understand why the Avengers are not simply walking into Avengers: Doomsday as one perfectly functioning superhero team, Captain America: Civil War is essential. Among the movies to watch before Avengers: Doomsday, Captain America: Civil War is particularly valuable because it explains why the Avengers eventually became a fragmented group rather than a permanent superhero team.
The movie establishes the ideological conflict between Steve Rogers and Tony Stark that ultimately fractures the original Avengers. More importantly, it introduces or develops characters whose legacies remain important to the MCU, including Sam Wilson, Bucky Barnes, Black Panther and Spider-Man.
That matters because the Avengers of the modern MCU are fundamentally different from the team we saw in The Avengers or Age of Ultron.
Sam Wilson has become Captain America. Bucky has evolved beyond his identity as the Winter Soldier. And the emotional history between these characters gives the eventual crossover much more weight.
You could technically skip Civil War if you remember the original Avengers storyline, but watching it again provides important context for the characters who remain active in the MCU.
Among the movies to watch before Avengers: Doomsday, this is one of the most useful older entries because it establishes the fractures that still define the post-Endgame superhero landscape.
2. Avengers: Infinity War
There is almost no argument here: Avengers: Infinity War belongs on every serious list of movies to watch before Avengers: Doomsday. Anyone creating a list of movies to watch before Avengers: Doomsday should keep Infinity War near the top because it establishes the scale of an Avengers-level conflict and the importance of bringing different heroes together.
It establishes the scale of an Avengers-level threat and, more importantly, demonstrates what happens when multiple superhero teams are forced to confront an enemy who operates beyond conventional physical combat. Thanos’ victory also fundamentally changes the MCU.
The film connects the Avengers, Guardians of the Galaxy, Doctor Strange, Spider-Man, Wakanda and several other corners of Marvel’s universe into one enormous conflict. Watching it again reminds you how Marvel handles massive crossover storytelling before Doomsday expands that formula even further.
It also provides important emotional context for characters such as Doctor Strange, Thor, Bruce Banner and Peter Parker. If Avengers: Doomsday is designed to feel like another universe-shaking event, Infinity War is one of the clearest examples of the storytelling language Marvel is building upon.
3. Avengers: Endgame
You should not watch Infinity War without immediately following it with Avengers: Endgame. In terms of the movies to watch before Avengers: Doomsday, Endgame is arguably the most important film from the original Avengers era because the new Avengers story exists in the shadow of everything that happened here.
Beyond concluding the original Avengers saga, Endgame establishes the emotional and structural foundation for the MCU that exists today.
The film closes the stories of several original Avengers while passing the superhero mantle toward a new generation. Steve Rogers’ retirement, Tony Stark’s sacrifice, Natasha Romanoff’s death and the transformation of characters such as Sam Wilson and Bucky Barnes all continue to influence the franchise. Most importantly, Endgame represents the final chapter of the original Avengers era.
That distinction matters because Avengers: Doomsday is not simply assembling the same team again. Marvel is building an entirely different Avengers landscape, one in which the original heroes’ legacy collides with newer heroes and characters from alternate realities. If you are deciding which movies to watch before Avengers: Doomsday from the Infinity Saga, Endgame is the absolute priority.
4. Spider-Man: No Way Home
Spider-Man: No Way Home is arguably the movie that makes the MCU’s multiverse concept emotionally understandable. The reason Spider-Man: No Way Home belongs among the movies to watch before Avengers: Doomsday is that it turns the multiverse from a theoretical concept into something audiences can see affecting familiar Marvel characters.
Rather than treating alternate universes as an abstract scientific idea, the film turns them into a character-driven story. Peter Parker’s attempt to fix his life accidentally opens the door to alternate versions of familiar characters. That is extremely important preparation for Avengers: Doomsday.
The film demonstrates that characters from different realities can exist simultaneously and interact with one another. It also establishes how dangerous uncontrolled multiversal interference can become. For anyone trying to understand the multiverse before Avengers: Doomsday, No Way Home is therefore much more useful than simply reading a timeline explanation online.
It lets you experience the concept through the characters. And because Marvel is now bringing together characters from different cinematic histories, No Way Home provides one of the clearest demonstrations of the crossover philosophy that Doomsday is expanding.
5. Doctor Strange in the Multiverse of Madness
If No Way Home introduces the emotional possibilities of the multiverse, Doctor Strange in the Multiverse of Madness explores its darker consequences. For viewers deciding which movies to watch before Avengers: Doomsday, Doctor Strange in the Multiverse of Madness should be considered essential because of its exploration of alternate realities and incursions. This movie is particularly important because it establishes the concept of incursions: catastrophic collisions between realities that can potentially destroy entire universes.
That idea becomes extremely relevant when discussing the larger direction of the Multiverse Saga. Doctor Strange’s journey also demonstrates that alternate realities are not simply places where audiences can meet different versions of familiar heroes. They can fundamentally alter the identities, histories and consequences attached to those characters.
For Avengers: Doomsday, that distinction matters enormously. A multiversal crossover becomes much more interesting when the heroes are not simply meeting alternate versions of themselves, but confronting the possibility that entire realities could collapse. That is why Doctor Strange in the Multiverse of Madness remains one of the essential movies to watch before Avengers: Doomsday. Current Marvel watch guides continue to identify the film as one of the key Multiverse Saga entries.
6. Loki — Seasons 1 and 2
Technically, Loki is not a movie, but skipping it would be a major mistake. If you have time for only one MCU series before Avengers: Doomsday, make it Loki. Strictly speaking, Loki is not one of the movies to watch before Avengers: Doomsday, but it is one of the most important Marvel projects to include in the overall preparation.The series introduces the TVA, explores variants, branching timelines and the mechanics of the multiverse, while Loki’s character arc eventually becomes deeply connected to the stability of those timelines.
Season 2 is particularly important because it expands the consequences of the branching timeline problem and leaves Loki in a radically different position within the multiverse. That makes Loki one of the most valuable pieces of homework before Avengers: Doomsday.
Multiple current watch guides identify both seasons as essential preparation rather than optional MCU viewing. If your goal is to understand the mechanics behind the multiverse rather than merely recognize returning characters, Loki should be near the top of your list.
7. Deadpool & Wolverine
This is probably the single most important movie to watch if you are curious about how the old Fox Marvel universe connects to the modern MCU.
Deadpool & Wolverine does something that previous MCU movies could only tease: it turns Marvel’s cinematic history into part of the story. Through the TVA and the film’s multiversal premise, Deadpool and Wolverine become connected to characters and realities that existed outside the traditional MCU continuity.
That makes the movie especially important for Avengers: Doomsday because the upcoming crossover includes legacy X-Men actors from the Fox era. Patrick Stewart, Ian McKellen, James Marsden, Rebecca Romijn, Alan Cumming and Kelsey Grammer are among the returning X-Men performers associated with the upcoming crossover, making the older X-Men continuity increasingly relevant.
Deadpool & Wolverine effectively serves as the bridge between those worlds. For that reason, it belongs near the top of every list of movies to watch before Avengers: Doomsday.
8. X-Men
If you are going to watch Deadpool & Wolverine, watching the original X-Men becomes worthwhile. Released in 2000, X-Men introduced the cinematic versions of Professor Charles Xavier, Magneto, Wolverine, Cyclops, Storm, Jean Grey and other mutants who helped establish the modern superhero movie era.
More importantly, it allows you to understand the relationships between the characters before they appear in a completely different crossover environment. The return of the original X-Men actors gives the upcoming Avengers: Doomsday a strong sense of cinematic history. These are not newly created MCU variants with no history; many of the performers are returning to roles they played years or even decades ago.
So while X-Men is not strictly necessary for understanding every plot point in Doomsday, it is highly recommended if you want the crossover’s emotional and nostalgic moments to land properly.
Also Read: Avengers: Doomsday Cast Revealed – X-Men Join the MCU in Epic 2026 Crossover
9. X2: X-Men United
X2 is arguably the best place to continue if you decide to explore the original X-Men franchise. The film deepens the relationship between Professor X, Magneto and Wolverine while expanding the world of mutants and the political conflict surrounding them.
It also gives you a stronger understanding of the original cinematic X-Men ensemble. Current fan and editorial watchlists frequently include X-Men and X2 when preparing for Avengers: Doomsday, particularly because of the returning legacy cast.
You do not necessarily need to marathon every Fox X-Men movie, but watching the first two makes the legacy crossover considerably richer.
10. X-Men: Days of Future Past
If you have time for one additional X-Men film beyond the original movies, choose X-Men: Days of Future Past.
Why?
Because time travel and alternate timelines are central to the film. The movie uses a major temporal reset to fundamentally alter the X-Men continuity, making it one of the most useful films for understanding how the franchise itself already played with alternate timelines long before the MCU began doing the same thing.
It is not currently necessary to understand Avengers: Doomsday scene by scene, but it provides valuable context for the strange relationship between the different generations and timelines of the X-Men films.
In other words, if your goal is to understand why Marvel can bring legacy X-Men characters into a multiversal Avengers movie without simply pretending the previous movies never happened, Days of Future Past is an excellent addition.
11. Captain America: Brave New World
This is one of the more recent movies to watch before Avengers: Doomsday, particularly if you want to understand the current political and superhero landscape of the MCU. Sam Wilson is now Captain America, and the film continues the character’s evolution from the Falcon into the new leader carrying Steve Rogers’ shield.
That transition is important because Doomsday is expected to operate in a world where the old Avengers identity has been replaced by a much more complicated collection of heroes and teams. The movie also brings back President Ross in his transformed Red Hulk form, adding another layer to the MCU’s evolving power structure.
It may not be as important to the multiverse storyline as Loki or Doctor Strange in the Multiverse of Madness, but it is useful character preparation. If you want to understand the modern Captain America before watching Doomsday, put it on your list.
12. Thunderbolts*
This is one of the most important recent movies on the entire list. The reason is simple: Thunderbolts establishes the group that becomes the New Avengers.
Instead of focusing on the traditional Avengers lineup, the film assembles a group of damaged, morally complicated and unconventional characters, including Yelena Belova, Bucky Barnes, John Walker, Red Guardian, Ghost and others. The movie gives this group an identity and, crucially, positions them within the MCU’s post-Endgame power structure.
That makes Thunderbolts extremely valuable preparation for Avengers: Doomsday. If the upcoming movie is going to throw several different superhero factions into the same conflict, you need to know who the New Avengers are and why they exist.
Recent essential watch guides consistently place Thunderbolts among the most important projects before Doomsday. For a modern MCU rewatch, this should be considered mandatory.
13. The Fantastic Four: First Steps
If you watch only one movie immediately before Avengers: Doomsday, The Fantastic Four: First Steps is arguably the strongest candidate. The film introduces Marvel’s First Family into the MCU and establishes a distinct alternate world populated by Reed Richards, Sue Storm, Johnny Storm and Ben Grimm.
That matters because the Fantastic Four are not simply another superhero team being added to the Avengers. They have a completely different scientific, family-oriented and cosmic identity.
The film also establishes the version of Doctor Doom associated with Marvel’s current multiverse storyline, making it one of the most direct pieces of preparation for Doomsday. Recent essential-watch lists place The Fantastic Four: First Steps alongside Thunderbolts and Deadpool & Wolverine as one of the central pieces of preparation.
If you are wondering which movies to watch before Avengers: Doomsday immediately before entering the theater, this one should be near the top.
14. Black Panther: Wakanda Forever
Black Panther: Wakanda Forever is not as directly connected to the multiverse as Loki or Doctor Strange in the Multiverse of Madness, but it becomes more relevant because of Namor and Wakanda’s place in the wider MCU. The movie introduces Tenoch Huerta’s Namor and expands the political landscape surrounding Wakanda.
If Doomsday brings together heroes from multiple corners of the MCU, understanding where Wakanda and Namor stand is useful. It is therefore a secondary recommendation rather than a mandatory watch. Still, if you have already watched the main MCU entries and want to deepen your preparation, add it to your list.
15. Shang-Chi and the Legend of the Ten Rings
Shang-Chi is another interesting addition rather than an absolute requirement. The film introduces Shang-Chi and establishes the Ten Rings as one of the MCU’s major mysterious artifacts. Its significance to the larger MCU remains less direct than Loki, Deadpool & Wolverine or Thunderbolts, but Shang-Chi’s existence within the current generation of heroes makes the film worthwhile if you are trying to refresh the post-Endgame landscape.
Some current watch guides include it among their broader Doomsday preparation lists, while more aggressive “essential only” lists leave it out. That difference is important: not every title appearing on a giant watchlist is equally necessary.
16. Spider-Man: Brand New Day
This one requires special attention because it is no longer an upcoming movie as of August 2026.
Spider-Man: Brand New Day has already entered the MCU’s 2026 theatrical lineup and therefore belongs on the pre-Doomsday viewing roadmap. The movie continues Tom Holland’s Peter Parker storyline and expands the current MCU’s street-level and superhero landscape.
It is especially relevant if you want to follow the state of Peter Parker’s story before the next Avengers crossover. However, I would still place it below No Way Home, Loki, Deadpool & Wolverine, Thunderbolts and The Fantastic Four: First Steps when prioritizing a limited watch schedule.
Do You Need to Watch Every X-Men Movie?
No.
This is one of the biggest mistakes people make when searching for movies to watch before Avengers: Doomsday. The return of the original X-Men cast does not automatically mean you need to watch every Fox Marvel movie ever released.
If you have limited time, prioritize:
X-Men (2000)
X2: X-Men United
X-Men: Days of Future Past
Deadpool & Wolverine
If you have significantly more time, you can explore the remaining X-Men movies afterward.
Logan is also worth watching for its emotional importance to Wolverine, although its relationship to the upcoming crossover should be treated as supplementary rather than required homework.
The Best Avengers: Doomsday Watch Order
If I were building a practical viewing order for someone who wants maximum story payoff without watching dozens of projects, I would use this sequence:
1. Captain America: Civil War
2. Avengers: Infinity War
3. Avengers: Endgame
4. Spider-Man: No Way Home
5. Doctor Strange in the Multiverse of Madness
6. Loki — Season 1
7. Loki — Season 2
8. X-Men
9. X2: X-Men United
10. X-Men: Days of Future Past
11. Deadpool & Wolverine
12. Captain America: Brave New World
13. Thunderbolts*
14. The Fantastic Four: First Steps
15. Spider-Man: Brand New Day
This is not a chronological MCU order. It is a narrative preparation order designed specifically around the characters, teams and multiverse concepts most likely to matter when Avengers: Doomsday begins.
Why Avengers: Doomsday Needs More Homework Than Endgame
There is an important difference between preparing for Avengers: Endgame and preparing for Avengers: Doomsday.
Endgame was primarily the culmination of the MCU’s first decade. Its central storyline was built around characters audiences had followed since Iron Man. Doomsday, by contrast, is operating across multiple cinematic histories.
The movie is expected to combine the current MCU, the New Avengers, the Fantastic Four and legacy X-Men characters. That makes it less like a traditional sequel and more like a collision between different eras of Marvel filmmaking. Recent reporting confirms the scale of the returning cast and the involvement of the original X-Men performers. That is precisely why choosing the right movies to watch before Avengers: Doomsday matters. You are not simply revisiting a franchise. You are preparing for several franchises to collide.
Final Verdict: The Movies to Watch Before Avengers: Doomsday
The smartest Avengers: Doomsday preparation is not the longest possible watchlist. It is the most strategically chosen one.
Start with Avengers: Infinity War and Avengers: Endgame to refresh the Avengers’ legacy. Move into Spider-Man: No Way Home and Doctor Strange in the Multiverse of Madness to understand the multiverse. Watch both seasons of Loki to understand the mechanics behind the branching timelines. Then watch Deadpool & Wolverine to see how Marvel is connecting the Fox universe to its larger multiverse.
After that, Thunderbolts introduces the New Avengers, while The Fantastic Four: First Steps prepares you for Marvel’s First Family and the increasingly important Doctor Doom storyline. Finally, if you want the full emotional payoff from the returning mutants, watch the original X-Men films before entering the theater.
The most important thing to remember is that Avengers: Doomsday is being built as a convergence point. Marvel is taking characters from different generations, franchises and realities and putting them on the same battlefield.
That is why the right movies to watch before Avengers: Doomsday can make the difference between simply recognizing a cameo and understanding why that cameo matters. And with Avengers: Doomsday scheduled for December 18, 2026, there is still enough time to build your perfect Marvel marathon.
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FAQs About Movies to Watch Before Avengers: Doomsday
What movies should I watch before Avengers: Doomsday?
The most important movies are Avengers: Infinity War, Avengers: Endgame, Spider-Man: No Way Home, Doctor Strange in the Multiverse of Madness, Deadpool & Wolverine, Thunderbolts, Captain America: Brave New World and The Fantastic Four: First Steps. The original X-Men films are recommended if you want more context for the returning mutant characters.
Is Loki necessary before Avengers: Doomsday?
Yes. Although Loki is a series rather than a movie, both seasons are among the most important preparation because they establish the TVA, branching timelines and the larger mechanics of the MCU’s multiverse.
Is The Fantastic Four: First Steps essential before Avengers: Doomsday?
Yes. It introduces Marvel’s First Family and establishes the Fantastic Four corner of the universe immediately before the larger crossover. It is one of the most important modern movies to watch before Avengers: Doomsday.
When does Avengers: Doomsday release?
Avengers: Doomsday is scheduled to arrive in theaters on December 18, 2026.