In a recent podcast interview with Empire, Fox's Mark Millar discussed the future of the Marvel-Fox film partnership, including the X-Men franchise and Josh Trank's in-development Fantastic Four reboot.
"They asked me to come in and work out a plan," Millar said. "Unfortunately at this point I can’t get too specific. I do have a three- to four-year plan of where things could go, but you know, I’ll be working with guys like Matthew [Vaughn, the director of X-Men First Class] and Josh Trank, who’s the new director on Fantastic Four, and just figuring out how everything can work together and not contradict each other. But I also don’t want to make it too much of a mess either, with everyone showing up in everyone else’s films."
Of course, by now Matthew Vaughn is no longer involved in X-Men: Days of Future Past, but that's a pretty recent development and it's entirely possible the interview was conducted before then. That said, Vaughn also directed Kick-Ass and will be directing the upcoming The Secret Service, based on another comic written by Millar. It wouldn't be surprising if Millar still considers him "part of the team."
Even though he might not want to create another interactive Marvel Universe by having team-ups and guest appearance, Millar reiterated that he is interested in working out a continuity where none of the films contradict each other--or the Sony Spider-Man films or the Marvel Studios movies.
He explained, "What my dream is, as a fan, is that when you go and see any Marvel movie that it feels as if they’re all taking place in the one universe like when you pick up a Marvel comic. You should feel as if they’re all taking place in one big kind of cohesive place."