A number of new cosmetics were found in the game files during today's v8.20 update. As usual with patches, these are expected to release over the coming weeks along with skins that have been encrypted further, but no specific dates can be given.
UPDATE: Added EvilSuit set:
All of these cosmetics have been data-mined by leaker @Lucas7yoshi_ and sent to us, so thanks to him. Here's a look: