The Marvel Cinematic Universe invites speculation and fan theorizing. It's a huge part of the hobby, as following these connected TV shows and movies sparks interest in audiences about what's coming next. With narrative threads left to tie up, new comic characters to introduce, and Easter eggs to explore in further detail, it's not that surprising that fan theories help to fill these gaps until Marvel reveals what its next stage of the plan may be. Of course, fan theories are often fantastical and not grounded in any legitimacy.
Source：https://www.cbr.com/mcu-theories-better-than-canon/
