I wonder if the bubblehead could be Ahab, Cassandra Nova or Dark Beast?
Maybe its one of the future brotherhood which would be right up Bendis alley to use that garbage.
Didn't think about Dark Beast but def a possibility with Bendis' obsession with morally questionable Hank McCoy.
What about Sebastian Shaw? He's been out the picture since the end of Generation Hope, where I think he regained his memories of who he was (or at least found the files on himself). He'd know all about sentinels given Shaw Industries involvement with them back in the day. Time for a comeback of the Helfire Club too, given the hellfire kiddies are now out of the picture. Would kind of make sense too, with all the Jean Grey / Phoenix stuff that's been going on recently and has been a theme of Bendis's run on the X-books.