Bryan Singer's latest sequel to the X-Men franchise finally has a proper trailer. Written by comic book writers Chris Claremont and John Byrne, the storyline involves the entire ensemble from both the original X-Men films and X-Men: First Class joining forces in order to change the past and save the future.

Starring the likes of Hugh Jackman, James McAvoy, Michael Fassbender, Jennifer Lawrence, Halle Berry, Anna Paquin, Ellen Page, Peter Dinklage, Patrick Stewart, Ian McKellen and Shawn Ashmore, X-Men: Days of Future Past is set to hit theaters on May 23, 2014.