Right. We should make an AU-verse where Merlin totally healed him with magic and Arthur thinks Will did it but he's kind of obligated to Will for saving his life and all, so Will goes back to Camelot with them and-

Wait. You just said that.

-Anyway, if we can stick this AU possibility in people's minds, maybe we can get lots of Will!fic. Obviously people are interested - kink meme has several Arthur/Merlin/Will prompts already. It's just a matter of providing the trope so folks don't have to explain it every fic.