You know...the more I thought about this subject and read through the responses, my idea slightly shifted. I like the idea of Mac making a deal with Mephiso. I would write a mini-series that would work out how the members who died are dealing with it in the afterlife. Mac is shown by Mephisto (who knows that he would probably be the best one to try and corrupt) glimpses into these reactions...showing Heather's last. With her in grief over the fate of their child, Mac makes a deal to return them to life (feeling that his daughter needs her parents). Upon their return, the backhanded deal is revealed that Mac is now ethereal, cannot leave Heather's side, and perhaps his memory altered.

I think that after the mini-series, a new series would launch with most of the original members (though they would slightly be haunted by their deaths). Heather would retire and take care of her daughter, not knowing that Mac is there. She would also be haunted by what happened a little confused as to why Mac didn't return with them. I think that for a story arc or two I would have them dealing with their deaths and resurrections, and the repercussions of such a deal with the devil.

Just my two cents.

-Mystic