X-Men: Messiah Complex — Ed Brubaker

Just when it looked like there was no possibility of a future for mutants, hope arrives. But the X-Men aren't there to meet it the Marauders and Purifiers beat them to it. Now the race is on to get the first new mutant since House of M! This crossover epic may spell the end of mutantkind unless the X-Men can save their entire species from some of their deadliest enemies. Collects X-Men: Messiah Complex One-shot, Uncanny X-Men (1963) #492-494, New X-Men (2004) #44-46, X-Men (2004) #205-207, X-Factor (2005) #25-27