r/MCUTheories is a subreddit with 184k members. The most common flair used is theory, discussion/debate, avengers doomsday, avengers secret wars, and spider-man: brand new day.
The place to drop your theories about the MCU. Spoilers are allowed but please tag them as such.
Flair Used in r/MCUTheories
#1
Theory
: "Endgame Encore trailer just dropped and..."
58 posts
#2
Discussion/Debate
: "Characters that the MCU introduced but you’ll probably never see again"
27 posts
#3
Avengers Doomsday
: "The exclusive look will be Loki giving the tva card to Steve"
22 posts
#4
Avengers Secret Wars
: "Do you think Avengers: Secret Wars will be bigger than Avengers: Endgame?"
9 posts
#5
Spider-Man: Brand New Day
: "Tom Holland spiderman origin theory"
6 posts
#6
Leak
: "Detailed Avengers: Doomsday plot leak theory connecting 828 Doom, Tony Stark's lineage, and Steve Rogers"
3 posts
#7
Unannounced/Other
: "In the MCU, Logan will become Prof./Old Man Logan and Laura will become The Wolverine."
2 posts
#8
Poll
: "Post civil war - who would win the presidential elections. Tony Stark or Steve Rogers"
1 post
#9
Theory - Multiverse
: "My attempt to visualise the Multiverse [OC]"
1 post
Member Growth in r/MCUTheories
Yearly
+73k members(65.0%)
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Last updated: August 28, 2026