ok, slowly but more often than we would have guessed, we're finding out how the costumes of the future will look like.
Two pics to date:
we'll have to wait to see if the back of Iceman will be just like Charles one or if it will have more details.
Same with the other x-men. We can see a white part on Shawn's arm, so if thats a hint of the rest his full costume, maybe each costume will combine two colours, with black being the unifiying colour.
Next Big X-Men Crossover
* 2017- X-Men: Age of Apocalypse
Edit: Forget about 2017:
Official announcement -> X-MEN: APOCALYPSE - MAY 27, 2016!!!!