What if the asteroid that forever changed life on Earth missed and giant dinosaurs never became extinct? In this epic journey into the world of dinosaurs, an Apatosaurus named Arlo makes an unlikely human friend. While traveling through a harsh and mysterious landscape, Arlo learns the power of confronting his fears and discovers what he is truly capable of.

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...

A teleporting mutant makes an assassination attempt on the life of the president. This causes the president to consider the mutant-human war that was predicted by Eric Lensherr (Magneto) earlier. In an effort to get to the bottom of the attack and prevent world-wide war, Charles Xavier sends out Storm and Dr. Jean Grey to search for the teleporting mutant and discover the truth behind the assassination attempt.