2. Avengers vs. X-Men

Avengers X-Men

Batman v Superman? Captain America v Iron Man? They sound good and all, but both pale in comparison to what a fight between The Avengers and X-Men would look like.

What causes these two teams to clash in a movie would probably have to differ from the slightly underwhelming comic book series which saw them come to blows over the Phoenix’s arrival on Earth, but that wouldn’t be a bad place to start.

Of course, they don’t exist in the same universe, so that complicates matters as do the obvious rights issues. Can you imagine though if Disney and Fox agreed to split everything down the middle and made this one happen? If The Avengers alone can earn $1.5 billion (you have to imagine the sequel getting near or beyond the $2 billion mark), then seeing these two iconic teams face off on the big screen would easily be even bigger.