Mark Millar says ‘Fantastic Four’ and ‘X-Men Days of Future Past’ to exist in same universe with cameos and crossovers likely
Mark Millar has revealed that the new Fantastic Four movie will exist in the same cinematic universe as the X-Men series.

Marvel Comics (Fantastic Four v3 #59)
The Kick-Ass creator and 20th Century Fox creative consultant claimed that the studio is planning to put characters from both franchises together on screen.
“Without question I think you have to see some of these guys showing up in each other’s movies,” Millar told SFX.
“I think the most exciting thing in superhero movies, until The Avengers came along, was when Nick Fury showed up in Iron Man. Even though it was a guy with an eye patch it was really cool – and I expect we will see more of that.”
Millar described Fox’s previous Fantastic Four movies as “not very good”, but confessed that he has a sentimental attachment to them because his daughter is a fan.
“For the new one, all they have to do is make it great. It sounds obvious and it is,” he said.
“Sam Raimi gave us a great Spider-Man. Christopher Nolan gave us a great Batman. So a brilliant director is probably the most important thing for a great Fantastic Four.
“Tim Story was seen as an odd choice for Fantastic Four, but when you have a Josh Trank you know you are in safe hands.”
Trank, the director of Chronicle, is rumored to be targeting a 2015 release for The Fantastic Four.
X-Men: Days of Future Past arrives in theaters July 17, 2014 with The Fantastic Four due on March 6, 2015.