r/MCUTheories is a subreddit with 155k members. The most common flair used is question, discussion/debate, theory, avengers doomsday, and spider-man: brand new day.
The place to drop your theories and memes about the MCU. Spoilers are allowed but please tag them as such.
Flair Used in r/MCUTheories
#1
Question
: "How did the Red Skull (Hydra) actually end up as the Stonekeeper on Vormir?"
34 posts
#2
Discussion/Debate
: "Marvel had the perfect Iron Man successor, so why ignore him and go with Ironheart instead?"
33 posts
#3
Theory
: "I think they will be the protagonists of Doomsday"
27 posts
#4
Avengers Doomsday
: "Nothing will change my mind that one of these guys should’ve played Doom"
12 posts
#5
Spider-Man: Brand New Day
: "At this point I suppose they'll have to say that Spider-Man was indeed facing serious supervillains during these four years to justify his complete absence from the New York storyline."
6 posts
#6
Unannounced/Other
: "Kenneth Branagh says he has ideas for a final ‘THOR’ film that’s “more in the territory” of ‘LOGAN’"
3 posts
#7
Meme
: "i’m already excited for Bullseye’s redemption arc and for him being a villain again for the 69th time 😎😎😎"
3 posts
#8
Thunderbolts*
: "I think he would have been an amazing Sentry/Void"
1 post
#9
The hardest choices require the strongest wills.
: "Are you disappointed we probably won't be getting another Ant-Man and The Wasp movie?"
1 post
#10
I love you 3000
: "Is It Time for Tom Holland’s Spider-Man to Pass the Baton to the Next Generation?"
1 post
Member Growth in r/MCUTheories
Yearly
+60k members(62.9%)
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Last updated: June 2, 2026