← All communities
Reddit community

r/MCUTheories

Theories for the MCU. The place to drop your theories about the MCU. Spoilers are allowed but please tag them as such. Founded 2018 · 187K members

190.7K members. The best post we have captured here reached 28K upvotes, which works out to 147 per 1,000 members.

147peak upvotes per 1,000 members
190.7Kmembers
28Kbest post
4.4Kmost comments
413posts we track

Open r/MCUTheories on Reddit ↗

What actually lands here

The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.

46% 27% 14% 11%
Image 46% Text 27% Question 14% Gallery 11% Video 3%

The topics it labels

Flairs are the community's own categories, and the closest thing a subreddit has to telling you what it wants.

Theory 108 Discussion/Debate 76 Avengers Doomsday 40 Question 21 Spider-Man: Brand New Day 12 Leak 9 Avengers Secret Wars 8 I’ve come to bargain 3 The hardest choices require the strongest wills. 3 Thunderbolts* 2

What the ceiling looks like

The biggest posts we have captured here. Links go to the original on Reddit.

Iron Heart got people to watch Iron Man 3, that's good.

↑ 28K 💬 159 image 2025

Why was everyone so hostile towards John Walker from the very beginning?

↑ 19.4K 💬 3.1K video 2025

This kid from Ironman 3 would've been the better choice for Ironman successor than ironheart

↑ 15.9K 💬 1.8K image 2025

I think Spider-Man, Professor X and Magneto are the only characters where they've never had a bad casting

↑ 13.9K 💬 565 image 2025

I Have a theory

↑ 11.8K 💬 371 image 2025

Marvel had the perfect Iron Man successor, so why ignore him and go with Ironheart instead?

↑ 11.5K 💬 1.1K image 2026

I am rewatching the MCU and this is exactly why they needed to sign the treaty😭

↑ 11.5K 💬 919 image 2025

It was odin right?

↑ 10K 💬 401 image 2025

MCU Magneto & Charles

↑ 9.9K 💬 4.4K image 2025

Why were some called by their names and others by aliases?

↑ 9.8K 💬 283 image 2025

Communities its size

Within four times the member count either way, so the comparison is fair. Sorted by upside.

r/MCUTheories, in numbers

Answered from the posts ViralHunt holds from this community, not from Reddit's own about page.

What is r/MCUTheories?
r/MCUTheories ("Theories for the MCU") describes itself this way: The place to drop your theories about the MCU. Spoilers are allowed but please tag them as such. It was founded in 2018 and has 187K members.
How many members does r/MCUTheories have?
r/MCUTheories has about 190.7K members. ViralHunt has tracked 413 of its posts; the biggest reached 28K upvotes, which is 147 per 1,000 members.
What is the most viral post on r/MCUTheories?
"Iron Heart got people to watch Iron Man 3, that's good." reached 28K upvotes and 159 comments in 2025, the highest score among the posts we hold from r/MCUTheories.
What subreddits are similar to r/MCUTheories?
Communities of a comparable size we track: r/Leakednews, r/SpaceXBets, r/circled, r/International, r/Global_News_Hub, r/FBI.
What kind of posts do best on r/MCUTheories?
Of the posts we hold, 46% are image posts and 27% are text posts.
When is the best time to post on r/MCUTheories?
Across 413 timestamped posts we hold, the slots whose posts averaged the highest score are Tuesday at 11:00 UTC (6.7K avg upvotes), Saturday at 18:00 UTC (6.3K avg upvotes), Wednesday at 21:00 UTC (6K avg upvotes). The busiest day is Saturday. For Reddit as a whole, see the best time to post on Reddit page.
How many upvotes does a post need to reach the top of r/MCUTheories?
The 20th-best post we hold from r/MCUTheories has 8.4K upvotes, so that is roughly the bar for the top twenty. We captured 38 posts from it in the last 30 days.

See what is climbing here before you write

ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.

Start free →

Every figure here is what ViralHunt has captured from r/MCUTheories, not everything the community has ever posted. We deliberately do not publish an average score: our sample is weighted toward a community's best posts, so an average would be flattering and wrong. Peak per 1,000 members is computed the same way for every community listed. See how we measure.