AICN reports that Fox recently registered the title 'Days of Future Past' with the Motion Picture Association of America's Title Registration Bureau.
The 'Days' title could seemingly refer to a 2 issue story arc in the 'X-Men' comics published in the early 80's Could this be the basis to the script for the upcoming as yet Untitled X-Men First Class Sequel?
The storyline involves both the present day and a future timeline caused by the X-Men's failure to prevent the Brotherhood from assassinating a U.S. Senator.
The entire cast is set to reprise their roles, including James McAvoy (Professor X), Michael Fassbender (Magneto), and Jennifer Lawrence (Mystique), Rose Byrne (Moira MacTaggert), January Jones (Emma Frost) and Nicholas Hoult (Beast).
Matthew Vaughn will call action again and Bryan Singer is returning as producer.
Simon Kinberg (Sherlock Holmes) is on board to pen the screenplay. All we know officially about the story is New Mutants will be part of the sequel and that Magneto and his relationship with Charles X. Xavier will be front and center as well.