What's up with that whole Phoenix/Jean Grey business? Is Illyana Rasputin really back from the dead? Why can’t the Shi’Ar and the Starjammers just get along? And what the heck is a Predator X? Find out in X-MEN: MESSIAH COMPLEX MUTANT FILES – featuring profiles on teams like X-Factor Investigations, the New X-Men, the Exiles and Excalibur; new friends and foes such as Darwin, Armor, Anole, Korvus, Daken and Kimura; plus Cassandra Nova, Selene, Trish Tilby, the Savage Land Mutates, Mammomax, the Marauders and even a bonus X-Men Roster Update!
— Description from Comic Vine community (comicvine.gamespot.com).
