Movies, Specials, and TV shows that are canon to the MCU.
Some controversial additions to this list:
Ang Lee's "Hulk" (2003). Although it was produced by Universal Pictures (not Marvel Studios), "The Incredible Hulk" (2008), which was produced by Marvel Studios, picks up from where "Hulk" left off, albeit with a complete recasting of all roles. This, in effect, back doors "Hulk" into the MCU, although it is not up to the standards set by Marvel Studios.
The Tobey McGuire and Andrew Garfield Spider-Man movies (Spider-Man, Spider-Man 2, Spider-Man 3, The Amazing Spider-Man, and The Amazing Spider-Man 2). Although these movies are still not canon to the MCU universe, they were effectively backdoored as MCU multiversal canon in "Spider-Man: No Way Home".
I left "Marvel's Agents of S.H.I.E.L.D." off the list because it's status as being canon is in dispute. Kevin Feige has stated that the TV shows made by Marvel Television (before it was absorbed into Marvel Studios) are separate from the MCU. It can be argued that the first two seasons are canon because of appearances from MCU characters (most notably the main character Phil Coulson, Nick Fury, Peggy Carter, Maria Hill, Dum Dum Dugan, and Lady Sif), and ties to the MCU movies ("Captain America: The First Avenger", "Thor", "Avengers" and "Avengers: Age of Ultron"). However, AoS diverges from canon in later seasons, such as the appearance of the Darkhold being different from the Darkhold seen in "WandaVision".
1/21/24 Update: Added in the Netflix Marvel series (Daredevil, Jessica Jones, Luke Cage, Iron Fist, and The Defenders) due to them officially being recognized as canon by Marvel/Disney.
2/13/2024 Note: The upcoming Deadpool 3 movie will officially be a part of the MCU, but it remains to be seen if Deadpool and Deadpool 2 (and possibly the X-Men movies) will be retroactively made [possibly multiversal] canon by the events of Deadpool 3.
