Plot details on X-Men: Days of Future Past are slim so far, but we do know it will involve time travel to a certain extent and has the largest ensemble cast of any of the films thus far. In an interview with Digital Spy, Bryan Singer was asked about Magneto's arc in the upcoming film and whether his morality struggle, as seen in X-Men: First Class, will still play a role in the film, something which Singer essentially confirmed.

"Because I have both Ian McKellen and Michael Fassbender in the picture, you'll deal with both sides of that point of view and it really explores the relationship between Xavier and Magneto and the evolution of that relationship, where it came from and where it's going."

Also in their interview, James McAvoy revealed he doesn't know if he'll have to be bald for the upcoming sequel. Check out the full video below.

Set for release on July 18, 2014, X-Men: Days of Future Past features a script by Simon Kinberg and is said to be inspired by Chris Claremont and John Byrne's comic book storyline that ran in "Uncanny X-Men" #141 and 142 back in 1981. "Days of Future Past" introduced the idea of an alternate future for Marvel's mutants that grew out of the Brotherhood of Evil Mutants killing an important senator, leading to a future where all mutants are hunted by Sentinels.

The film's cast includes Hugh Jackman, Ian McKellen, Patrick Stewart, James McAvoy, Michael Fassbender, Nicholas Hoult, Anna Paquin, Ellen Page, Shawn Ashmore, Halle Berry, Omar Sy and Peter Dinklage.