And go on to say that Mac hasn't returned in awhile, and then Wolverine says, "I think we need to go look for him, then." And Heather says, "Well I have given it up. I had a really rough year." Wolverine gives her the pep talk of, "You're a strong woman, and my healing factor is gone. I could really use you Heather." And Heather says, "Okay, let's do this then."
Seems like they could have gone a much simplier route than "We had a bad year" and "a bad fight" and "Mac might not come back."
That's just opening up questions that are begging to be answered; and if there's no intention of answering them, why not go a much simplier route?