The follow up to “X-Men: First Class” will take a look at an alternate future for the survival of all mutant. “X-Men: Days of Future Past” is positioned to be one of the biggest movies of the summer, while it will unite the cast from the original trilogy with the reboot trilogy. 20th Century Fox released a new video promo that highlights how the past is very different from how we know it.

“The X-Men ensemble fights a war for the survival of the species across two time periods in X-Men: Days of Future Past. The characters from the original X-Men film trilogy join forces with their younger selves from X-Men: First Class in a battle that must change the past – to save their future.”

The new X-Men movie features actors Hugh Jackman, James McAvoy, Michael Fassbender, Jennifer Lawrence, Halle Berry, Anna Paquin, Ellen Page, Shawn Ashmore, Nicholas Hoult, Peter Dinklage, Ian McKellen, and Patrick Stewart. Simon Kinberg wrote the film’s screenplay, while Bryan Singer directed it.

“X-Men: Days of Future Past” will hit theaters everywhere on May 23, 2014.