I think most of the people in this forum know that the rumor that Marvel is going to ax the whole x-line is as likely to be true as the rumor that Obama is actually a lizard from Júpiter; but i think is fun to speculate, so IN THE CASE that Marvel actually decides to do that, would you like to see the x-men gone for good or to stay around to mess with avengers.
Personally, given the alternatives, i would to see them as villains; like cyclops founding the jean grey church of the superior species, kitty hacking iron man's armors and having demonic lesbian sex with darkchylde, emma reopening the hellfire club, beast embracing his mad scientist side.