The end of an era for the X-Men The original team, now called X-Factor, takes center stage when Proteus returns from the grave. But when Apocalypse strikes, infecting Cyclops' son Nathan with a deadly virus, Cyclops must make a bitter sacrifice And the current X-Men return to Earth to find that Professor X's old foe the Shadow King has risen - and taken over Muir Island It will take X-Factor and the X-Men's combined strength to triumph - and when...