I actually posted a 500 word Doctor Who thing for it a week ago, so technically I already have. I'd kinda like to do a more substantial fic for it though - Captain Marvel is winning my poll on who to give wolves to, with Frontier Wolf second, but either way it's contingent on me getting around to canon review in time to write. (Especially Captain Marvel, as apparently there's been some really important Chewie storyline since the last trade I read.)