I'm not writing this (like, seriously--not writing this, so don't even suggest it), but it would be interesting to see what someone else could do with it.
Of course, the question is, would they be able to keep everyone in character? Because that's always the issue with crossovers, especially when both sets of characters are uber-capable in their own canons. (I shake my head over all the Teen Wolf-Supernatural crossovers where Sam and Dean suddenly can't cope with a bunch of teenaged werewolves. I mean, seriously? They've been doing that sort of thing since before they were teenagers, they've taken out demons, angels, even gods, and somehow a bunch of brand-new werewolves are too much for them? Makes me laugh in disbelief.)
Anyhow, just something that crossed my mind, and I remembered that I used to stick this kind of stuff up here, so I figured, why not?