There have been rumors circulating that Sony will work with Marvel to make better spider-man movies. I'm all for that. I do enjoy the Sony movies, but I think Marvel can make the movies much better.
Some people have said that Spider-Man can't be in the MCU because he wasn't there when the Chitauri attacked New York in The Avengers. People gave different theories and the most popular one I heard was that they could reboot the series. I do not like that idea because I really like Andrew Garfield as Spider-Man/Peter Parker and I thought the two Amazing Spider-Man movies were awesome.
Now I don't have a theory but I do have an idea and Marvel & Sony better be seeing this. We've already seen crazy stuff in Marvel movies, especially in the summer hit [Guardians of the Galaxy](movie:424073). So why not get even more crazier and explore different universes. Have the Guardians or Avengers go through a portal or something that brings them to Spider-Man's universe and that's how they can team up.
Speaking of that, now I know this is a long-shot, but maybe Fox can do that too with X-Men & The [The Fantastic Four](movie:34667) teaming up with Spider-Man, Avengers and Guardians and making one awesome movie that will bring in the money no doubt.
So just explore universes and I think the fan-boys (including myself) and fan-girls would be super excited.