There is no way X-Men going into outer space works with Singer involved.
Freaky bird people and Starjammers and all that shit? No way he can do that the way it needs to be done. He'd try to desaturate it somehow. This movie is as close as he gets to legitimate X-men and he & Kinberg still couldn't commit.
Fox could have their own Guardians of the Galaxy right now.
Singer's version of the Shiar Empire would probably be ancient humans who discovered advanced technology, left Earth, and formed their own human galactic empire in the far reaches of space or something. And Apocalypse simply errr... found some of their leftover tech in the past.