A lot of people are saying its Rogue, due to the white streaks, but that could be a deliberate miss step as the "streaks" could actually be red & just not coloured.

Plus Jean has green eyes (does Rogue?) plus the coats belt is very similar to the Phoenix belt, PLUS the other image is of a Cyclops look-a-like.

I'd prefer this as Jean's comeback than the crappy Cable baby