Just hats? What about faces, decals or other player customizations.
faces and decals of course will probably be pulled from the most popular ones
however uhh kinda hard to track that now along with the fact that i don't think many are as such now
player customization in particular is one i couldn't think of new ones for
iunno
maybe a skirt that is just like a square that replaces the pants and still the legs
uhh
pegleg+normalleg combo