The timeline for X-Men: Days Of Future Past becomes known as director Bryan Singer states the movie will take place about ten years prior to and after the previous X-Men films.
Describing X-Men: Days Of Future Past as an "Inbetwequel," Singer gives Empire an indication of when the movie is taking place.
"I’d say it’s not a sequel to one of the others,” Singer said. “It’s an inbetwequel — that’s what I call it, for lack of a better word. It takes place about ten years, give or take, after X-Men 3; and in the past it takes place about ten years after First Class.
Singer goes on to describe the global scope of the film which will see action in other countries.
"It takes place in the future and the past and then all over the world, from Russia to China, then France, and Washington, New York,” he offered. “It’s got scope, but most of the scope is in the breadth of the story."
Singer also mentions the comic book storyline, which obviously the movie is not a direct take on.
"It’s its own story, inspired by 'Days Of Future Past,'" Singer said.
Singer also gives clues to Professor Xavier and Magneto at the start of the film.
"They’re in a radically different place. Charles is in a very dark hole when we meet him, and Erik has been gathering his power," he said.
X-Men: Days of Future Past has a May 23, 2014 release date starring Jennifer Lawrence, James McAvoy, Michael Fassbender, Nicholas Hoult, Anna Paquin, Ellen Page, ShawnAshmore, with Hugh Jackman reprising as Wolverine, and returning cast members Patrick Stewart and Ian McKellan.