I think that the problem with the first resurrection of Jean Grey was that it was not foreshadowed - that, at the time of her first death, there was no intention that she return. In the scenario I'm envisioning, Stark's reaction to Aeryn's comment and his subsequent decision to confess are, I think, an indication that there's something more going on - that his return is not a retcon, but something foreseen from the beginning; and I think that that makes enough of a difference to justify it. My opinion only, of course.