Re: What would you rather see next - FIRST CLASS 2 or X4?
If they do X4 why would they have to address any changes to the way things ended in Last Stand? The way I see it, X4 would be a whole new story on its own, as essentially they would be in a changed Future/Present. So the story would pick up with the same characters from the Original Trilogy but they wouldnt be bound to that narrative.
At the end of DOFP the First Class characters should be left wondering if they changed the future. Therefore that first few moments of X4 would be confirmation that the world had in fact changed and that this is a whole new world from the Original Trilogy. So Cyclops and Jean could be alive since this would be an alternative future.