While it seems safe to say that the broad strokes of the original X-Men film still have to occur in order to fulfil what Wolverine sees at the end of Days of Future Past — Rogue and Wolverine still find their way to Xavier's school; Kitty Pryde and Bobby Drake are still students; Jean Grey, Cyclops, and Storm are still teachers — it's extremely unclear whether the specifics still take place. Does Magneto still kidnap Rogue and take her to the top of the Statue of Liberty to power a weapon intended to turn humans into mutants? Who knows?