Learn who said they and another actor might not be appearing. Story by Matt Cummings The return of the X-Men franchise in 2014 was flat-out one of the riskiest projects, but the time-traveling X-Men: Days of Future Past proved it could successfully blend time travel with two universes of actors into a fun and rewarding project. The film also reset certain unpopular storylines from X1-X3 which had alienated fans and put the franchise itself on shaky ground. One of the reasons for the success of DOFP was the return of Patrick Stewart as Professor Xavier and Ian McKellen as Magneto. Both of whom were and still are popular in the movie universe, and perhaps Stewart is as best known for his iconic performance as he is for Star Trek: The Next Generation 's Captain Jean-Luc Picard. But while fans could breathe a sigh of relief at Stewart's return, DOFP set up a whole new series of questions about the next film, X-Men: Apocalypse . Aside from the appearance of