But Mephisto is the Devil.
The Devil was played in "the Witches of Eastwick" by Jack Nicholson.
Jack Nicholson is pissed that Ledger "stole" the Joker role from him.
So clearly Mephisto would require that they undo, not Brokeback Mountain, but "the Dark Knight."
So the question is moot.
I think the real question is:
If Michelle Williams was a Green Lantern, would she try to take all the power rings for herself, rebel against the Guardians, kill Sinestro and Killewog and try to undo history, all to save Heath Ledger?
Auuuugh!!!
Not the Space Bug debate again!!!!