In 15 years of the MCU existing, I know that I have seen and read hundreds of different fan theories. There were some very popular ones, like Heimdall/the bofrost being tied to the Soul Stone, and some eccentric ones that only one guy insisted on but no one else believed.
What are your fan theory highlights?
The idea that the locations of the Infinity Stones spelled out Thanos. Tesseract (space stone) Heimdall (was the leading theory for the soul stone like mentioned above) Aether (reality stone) Necklace (time stone) Orb (power stone) Scepter (mind stone
It was close to plausible, though stuff like necklace and orb were stretching it. But even after infinity war I saw people trying to make it still work.
This is the kind of theory that worked great as a first-look graphic on 9gag and reddit, and when I first saw that I was like “oh that’s neat”. But as soon as you looked deeper into it and how the words were stretching it, it became clear that it couldnt be true. I felt really disappointed when I realized that someone simply came up with words in order to make if work.