When Cerebro is stolen from Xavier institute while the X-Men and Professor X are out, all evidence points to the Fantastic Four as the thieves. Includes in-depth bios of the Ultimate X-Men, the Ultimate Fantastic Four, the Ultimates, and Ultimate Spider-Man characters.

The X-Men and the Fantastic Four must put aside their differences to stop a menace from outer space that lurks aboard Space Station SImulacra, even as an unexpected adversary tries to turn them against one another.

The X-Men plan a way to retaliate after the events of Ultimatum while Rogue tries to prove her loyalty and the Fantastic Four attempt to save themselves and the Baxter Building. Collects "Ultimate X-Men" no. 98-100 and "Ultimate Fantastic Four" no. 58-60.

Humanity now faces mutants, a mysterious sub-species that is gifted with strange and frightening powers. Hidden among the population. they are feared and hated by their human cousins. As rumors and urban myths about their existence spread across the world, the US government creates its own initiative to deal with this threat: the Sentinel Project. Meanwhile two men wage a secret war for the hearts and minds of young mutants everywhere. Charles Xavier has recruited a cadre of students including Cyclops, Jean Grey and Beast, that call themselves the X-Men. But there are others out there, living in fear, struggling to deal with what they are: Ororo Munroe, Bobby Drake and another, more dangerous mutant named Logan. Simultaneously, the terrorist known only as Magneto has assembled The Brotherhood, a militant group dedicated to the overthrow of human authority. A war is on the horizon and these amazing young men and women will decide the future of all humanity! Collects Ultimate X-Men (2000) #1-6.

Presents the adventures of Reed Richards, Sue Richards, Benjamin Grimm, and Johnny Storm, four humans who are granted super powers.

The world tour is over. It ended abruptly and tragically, with deaths and hard decisions. After returning home to Westchester, the X-Men attempt to continue on, bringing normalcy back to their lives as best they can, opening the school to students once more. However, just as everything settles back to the mundane, Jean Grey's life shifts towards the bizarre. Her mental barriers are starting to erode, as she begins to see things... like a giant bird composed of flames. Ultimate X-Men (2000) #21-25.

Collects Ultimate Fantastic Four (2003) #1-6. Witness the beginnings of the Four - Reed Richards, Johnny Storm, Susan Storm and Ben Grimm - super-hero icons for the new century! When high-school genius Reed Richards enrolls at a secret government-sponsored school for the most gifted minds in the world, he unwittingly starts himself and his friends on the journey of a lifetime!