As much as I want
them back I can't come up with a single feasible reason how
they can do it without it looking/sounding stupid. I mean, it'd be such a stretch to bring both of them back--at least in the future. They'd have to come up with some pretty corny-ass excuse considering all that was done in X3.
(Not that this franchise is not above silly reasonings, like the one Charles Xavier used in X3..."The only explanation is that Jean's body must've wrapped itself in a cocoon of telekinetic energy."