Those who have seen the latest X-Men movie know that the end of the film completely rewrites every bit of continuity established over the last 14 years, meaning that a 10 year jump in the timeline from 1973 to 1983 could be very big. How did the Sentinel program stoppage affect the world as a whole? Did things become more harmonious between humans and mutants, or are things just as bad as they ever were? And what happens after Mystique takes Wolverine away on that boat? Will he still go through the Weapon X program and get his Adamantium claws? X-Men fans everywhere are dying to know the answers to these questions, but it will probably be a good long while until we actually get them.
X-Men: Apocalypse is currently on the release schedule for May 27, 2016 (almost exactly two years after the release of X-Men: Days of Future Past), which means that production will likely start up some time early next year.