"The End of The World As We Know It"
The X-Men arrive in Egypt to attempt to stop Apocalypse. Unfortunately, this is just what he wanted as all of "The Twelve" are now gathered in one place. Apocalypse manages to abduct all of these powerful mutants for use in his ultimate plan to become a god. But those left behind aren't going to give up without a fight.
SPOILER: Alex Summers and the members of X-Force and Generation X are actually Skrulls in this issue.