I think the X-Men Gold Annual covered this.
He popped up here and there in the Utopia period. I can't recall if he's appeared since.-Whatever happened to Adam X? If the somewhat fringe X Associates dragged into AoX, he somehow vanished long before the soon to be over train wreck started.......
Which one?-Whatever happened to the X Cutioner?
Shaw's dead. Again. Leland and Mastermind are still dead. Selene's wandering around out there somewhere. Pierce still really hates mutants so he's out.-How long until they resurrect the Inner Circle of the Old Hellfire Club?
For now, it's Emma's show.
Jason Wyngarde, yes. His daughters Martinique and Regan are, I think, still out there.-are we sure Mastermind is really Dead?