In preparation for the upcoming epic Avengers: Doomsday, Marvel Studios recently released a comprehensive list of films (and one TV show) to watch before Avengers: Doomsday. It includes obvious picks like Thunderbolts*, Fantastic Four: First Steps, X-Men, and Avengers: Endgame because they feature many characters, concepts, and situations that will appear in Avengers: Doomsday. However, many fans of the Marvel Cinematic Universe (MCU) and other non-MCU Marvel films have noticed that several films and TV shows were not included in the list.

Admittedly, no one has to see every Marvel film or TV show to appreciate and understand Avengers: Doomsday, but there are a few entries that are worth mentioning for both hardcore and casual fans to watch before the upcoming Avengers film. Bear in mind, not all of the films on this list can be considered essential viewing but should provide context to Avengers: Doomsday, so each film or TV show listed will note how essential it is to watch. Let’s get started from the oldest entries to the most recent.

Spider-Man (2002)

There are lots of reports going around and supposed leaked images from the beginning of Avengers: Doomsday that allegedly feature the OG Spider-Man portrayed by Tobey Maguire. This film along with X-Men launched the modern age of comic book/superhero films with a world that is quite unlike the traditional MCU and set the template for how Spider-Man should be presented in live action. If rumors are correct this world and Spider-Man will perish at the beginning of Avengers: Doomsday as Spider-Man falls to the X-Men who invaded this world from their own dimension to prevent an incursion that would have destroyed both worlds. Seeing the world of Spider-Man in all its glory before it is doomed will add more emotional weight for viewers and fans of the original Spider-Man trilogy.

Level of Necessity to Watch: Minimal

Thor (2011)

Being that the God of Thunder is one of the main characters in Avengers: Doomsday it is odd that Marvel Studios did not list his first film while the first Captain America film, Captain America: The First Avenger, is listed. Both films serve as notable introductions to two main characters in Avengers: Doomsday. Thor also introduces one of the MCU’s greatest villains turned anti-hero, Loki, Thor’s mischevious half-brother, who will appear in Avengers: Doomsday. Plus, Loki’s TV show was officially listed by Marvel as essential to watch, so to better appreciate the character and the emotional journey and growth Loki undertakes by the last episode of Loki, start off with Thor.

Level of Necessity to Watch: Moderate

Captain America: The Winter Soldier (2014)

Out of all the MCU appearances of Captain America this one comes closest to showing Steve Rogers’ dilemma as a man out of time. He finds it challenging to adapt to a new world which is unfamiliar to his traditional World War II setting and is why we can fully understand why at the end of Avengers: Endgame he chooses to return to that time period. More importantly this film introduces the Winter Soldier, one of the leaders of the New Avengers/Thunderbolts who will be prominent in Avengers: Doomsday. Sure we first meet Bucky Barnes in Captain America: The First Avenger, but he presumably died in that film. In this one, we find out how he survived and was transformed into the deadly by emotionally damaged Winter Soldier.

Level of Necessity to Watch: Moderate

X-Men: Days of Future Past (2014)

This film is admittedly iffy as being essential to watch despite its greatness. It introduces the gigantic robot Sentinels that will be featured in Avengers: Doomsday as seen in the newest trailer and it was the first Marvel film to feature mash ups of characters from different film eras, in this case the OG X-Men and the then-new X-Men roster with Wolverine serving as a time-traveling anchor to both teams. The film also leans heavily into time travel mechanics that resets the X-Men timeline,which may or may not clash with time travel rules in the MCU, but we’ll have to see Avengers: Doomsday for ourselves to find out.

Level of Necessity to Watch: Minimal

Ant-Man and the Wasp (2018)

The second Ant-Man film introduces the character of Ghost, who is one of the Thunderbolts/New Avengers and she is confirmed to appear in Avengers: Doomsday. Her backstory is one of the film’s major storylines and we see how she starts off as a villain and becomes a more sympathetic character. Also, she is indirectly the reason why Ant-Man ended up trapped in the Quantum Realm dimension until he is released in the first act of Avengers: Endgame. So in a sense, this film is essential viewing to better understand Ant-Man’s appearance and contribution in Avengers: Endgame, which is a core film to watch before Avengers: Doomsday.

Level of Necessity to Watch: Minimal

The Falcon and the Winter Soldier (2021)

Captain America: Brave New World is considered required to watch according to Marvel Studios but the list left out the TV limited series that preceeded that film. After seeing The Falcon and the Winter Soldier, it can be argued that the TV show is more important to watch than the fourth Captain America film. It better presents Sam Wilson’s emotional journey to pick up the mantle of Captain America and it also focuses on Bucky Barnes as he grapples with his inner demons from his past as the Winter Soldier. The limited series also introduce audiences to Sam’s partner Joaquin Torres, the new Falcon, and John Walker, the bargain store Captain America, who is one of the founding members of the Thunderbolts/New Avengers, and both characters appear in Avengers: Doomsday.

Level of Necessity to Watch: Major

Black Widow (2021)

Out of all the films and TV shows on this list, this may be the most important one to watch before Avengers: Doomsday. Why? It introduces two major characters in the upcoming film, one of which is the leader of the Thunderbolts/New Avengers and is one of the most popular characters of the recent MCU films. That is, of course, Yelena Belova, the spunky stepsister of Natasha Romanov, one of the OG Avengers. Yelena is a genuine scene stealer as first seen in Black Widow and most recently in Spider-Man: Brand New Day. Black Widow also introduces fans to Yelana’s quirky and funny stepfather, the Red Guardian, who will also appear in the next Avengers film and that is no small potatoes!

Level of Necessity to Watch: Major

What If…? (2021)

The animated TV series is included here because its premise is focused solely on alternate realities, a cornerstone concept in the MCU Multiverse Saga and Avengers: Doomsday. Most likely the TV show will have no relevance to the Avengers film but it does a respectable job, especially in the first season, of exploring and explaining the concept of a multiverse. This was best shown in the final episodes of the first season which also showed what a badass villain Ultron really is and the formation of an interdimenssional superhero team. Sounds familiar? Stick with the first season if time is limited and since it’s an anthology show the episodes can be seen in any order for the most part.

Level of Necessity to Watch: Minimal

Thor: Love and Thunder (2022)

Many consider the fourth Thor film to be the weakest entry, but it goves us with the most up-to-date iteration of the God of Thunder and where his mindset is in, which will continue in the upcoming Avengers film. Hopefully, he will not come off as a buffoon as he did in much of the film, though as shown in the Avengers: Doomsday trailers that does not seem to be the case. Thor: Love and Thunder has a major late plot development where Thor ends up with an adopted daughter called Love. She has been spotted in trailers for Avengers: Doomsday and her safety is supposedly one of the plot devices and Thor’s major motivation in the fifth Avengers film.

Level of Necessity to Watch: Moderate

The Marvels (2023)

This is one of the weaker MCU films but it has significant plot developments that are very relevant to the new Avengers film and the Multiverse Saga, overall. It’s odd why it was not included in the official list. Anyway, in the final act the villain tears open a hole in the MCU reality and one the Marvels, Monica Rambeau, uses her photonic powers to enter the hole into another reality in order to seal the hole. In The Marvel’s post credits scene it is revealed that she is trapped in the reality where the X-Men exist. This marks the first official crossover between the Fox X-Men and the MCU. The film also presents the beginning formation of the Young Avengers/Champions team who may appear in Avengers: Doomsday and/or Avengers: Secret Wars.

Level of Necessity to Watch: Major