Dont know if this has been posted. But comic Artist Jock aka Mark Simpson is helping with the costume design.
C: Lastly, i saw on your twitter that you were working on the new X-men movie, can you tell us what you’ve been involved in so far?
J: ”Mainly costume design at the moment. I can’t really say any more details than that I’m afraid!”
There you have it guys, Jock is working on the costume design for Bryan Singer’s new X-Men film, i bet they will look awesome!