The series will be written by Jeff Lemire and Charles Soule, with art by Leinil Yu (Secret Invasion). The story picks up as the Terrigen Mists have reached a saturation point in Earth’s atmosphere, and the X-Men must destroy it or risk the planet becoming permanently poisonous to Mutantkind. But the Inhumans won’t allow that, and they’re calling on The Royal Family, the Nuhumans, Ms. Marvel, Quake and Moon Girl to help them defend the planet.