Fox has finally revealed the full-length trailer for the superhero sequel X-Men: Days of Future Past [XMEN5]. In a future where the mutants from the original X-Men trilogy faces extermination, they communicate with their younger selves in the 1970s to stop the Sentinel program before it begins. Byran Singer [BSING] returns to direct the franchise and unite the cast, new and old. X-Men: Days of Future Past hits theaters on May 23rd.