My latest cosplay wishlist worm that I've gotten into my head is a genderbent Twilight Princess version Ganondorf. I'm having fun with sketching it right now, although really, the biggest difference is the hair and the armor fit. If I actually did it, it'd mostly be because I can't pull off crossplay. at. all. and I want to do the big menacing villain in crazy armor instead of my husband for once.
In Progress: Queen Beryl (La Reconquista, flashback armor)
Star Wars Celebration (no costumes though)