There actually I'd a way to do just that within the bounds of the rules: be the DM, and give your BBEG the Everlasting quality. Of course, you should never put something g like that in the hands of a player.
You know, giving that a player could be awesome.
As a GM just make it clear that it will cut both ways and that it WILL be featuring prominently in the story.
I mean, just because someone can come back from death, doesn't mean that people/the setting couldn't mess with him.
Actually, I know a buddy who would LOVE that quality for his divine emissary.
If you'll excuse me, I'll have to write something down.
We're still unsure. Mistborn House War and Nosh! are taking priority in the queue, but we generally don't update on this because a) our schedule shifts all the time, and b) we don't particularly like bringing non-updates just to get peoples' hopes up or invite questions as to our decision-making process. It's on the schedule, but until Pat's schedule clears up a bit more there will be no progress.
Best of luck with the new releases.