Here's the latest (and final) trailer for X-Men: Days of Future Past, hitting theaters May 20th, 2014. Looks pretty great! Unfortunately director Bryan Singer has a hit and miss track record, so there's no guarantees with this one. The official description: The ultimate X-Men ensemble fights a war for the survival of the species across two time periods in X-Men: Days of Future Past. The beloved characters from the original X-Men film trilogy join forces with their younger selves from X-Men: First Class, in an epic battle that must change the past -- to save our future.