We live in the golden age of superhero movies with high quality films releasing almost four times a year. One day, there might even be a X-Men and Avengers crossover – especially considering things are working towards it.
A few years ago an X-Men and Avengers crossover wasn't even an idea due to bad blood between Fox and Marvel, something that is mostly gone now. The producer for X-Men: Apocalypse and the producer of Deadpool are both open for making crossover films which further "proves" that fans might get one.
Tim Miller, the producer of Deadpool, explained his stance on the crossover in an exclusive interview with Crave. "I would love to, someday, in part, heal the rift between the world of X-Men and the world of Avengers."
In the same interview, Simon Kinberg, X-Men producer, added "I think we all would, and I think there's so much crossover in the comic it would be neat to see those characters one day share a movie."
What is extraordinary here is that producers who works for Fox opens up for crossovers with Marvel Studios, something that would not have happened a few years ago because of the competition and pride the two film houses had. Now they are basically inviting both Fox and Marvel to the negotiating table to discuss a crossover.
It is important to note that this is in NO WAY an announcement that a crossover is on it's way, just that we are one or two steps closer to a crossover.
Also, don't expect a Deadpool x X-Men crossover to come anytime soon either since the Deadpool franchise wants to go the same way as the Avengers, they had two Iron Man movies before Avengers, Deadpool wants to do the same. The two franchise are also too far away from each other in the timeline.
On Reddit a user who goes by the name 'Just_shut_up_bro' explained the situation (better than we ever could) between Fox and Marvel and why it is likely the two worlds will crossover:
"What people don't realize is that a lot of the reason we haven't had any kind of crossover yet is because of legitimate bad blood between the top brass at Marvel and Fox over a show called Mutant X (X-men rip-off) that Marvel dubiously produced and Fox sued over. The people in charge of Marvel movies are no longer the same people responsible for Mutant X though. Feige (head of Marvelstudios) no longer answers to Perlmutter (CEO of Marvel) by order of Bob Iger(CEO of Marvel's parent company Disney)
This change up could honestly make this sort of crossover, very feasible, especially if Spider-man in Civil War sets a good precedent, which it will.
Extra (though maybe superfluous) evidence to show this may be happening would be the numerous MCU references in Deadpool (even to Feige specifically like is said in the interview) as well as a speculative rumor floating around they'd be announcing an Avengers vs X-Men movie at this year's comic con."
Who knows, maybe we can get world peace if we someday can get a X-Men x Avengers crossover. If this happens then anything is possible.