What are some AUs that you haven't seen yet (in fanart, fics, etc) that you wish were a thing?

You know how we have the 4nemo/5wirl/6reeze anemo boys idol au? I keep thinking lately how much we need a knightlight rock band au set in the same universe. With maybe Varka as the band leader and lead guitar, Flins laying down smooth af bass lines, Lohen on drums because all he cares about is getting lost in the beat, and Illuga on lead vocals because of course he's the group's golden songbird. Naturally they're all in love, your honor.

This has just been on my brain for a while and I needed to put it out into the universe. What are some other AUs that you think should exist you haven't come across yet?