The ultimate X-Men ensemble fights a war for the survival of the species across two time periods. The 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.

After the re-emergence of the world's first mutant, world-destroyer Apocalypse, the X-Men must unite to defeat his extinction level plan.

With the help of their new recruits -- including Beast, Angel, Juggernaut, and Colossus -- the X-Men must face evolution itself in the form of their former teammate, Jean Grey. Possessed with the cosmic power of the Dark Phoenix, the resurrected Jean Grey has become a danger to herself, her mutant comrades, and the entire planet. A potential cure is discovered and processed to treat and ultimately eliminate the genetic mutations, once and for all....

With the help of their new recruits, The Beast and Angel, the X-Men must face evolution itself in the form of their former teammate, Jean Grey. Possessed with the cosmic power of the Dark Phoenix, the resurrected Jean Grey has become a danger to herself, her mutant comrades, and the entire planet. A potential cure is discovered and processed to treat and ultimately eliminate the genetic mutations, once and for all. As the battle lines are drawn, the...