Naturally, this revelation poses many questions, such as how will the older Professor X and Magneto exist alongside the younger versions played by James McAvoy and Michael Fassbender? Here's what Bryan Singer said, when asked that very question.
"The movie is called X-Men: Days of Future Past, use your imagination. More to come."
We reported earlier this month that production will begin on X-Men: Days of Future Past in April 2013.
X-Men: Days of Future Past was released May 23rd, 2014 and stars Hugh Jackman, James McAvoy, Michael Fassbender, Jennifer Lawrence, Halle Berry, Nicholas Hoult, Anna Paquin, Ellen Page. The film is directed by Bryan Singer.