I would love to see a Grinch skin for a character like Levi. I think his grumpy face would be perfect. Ideally one without the santa outfit would be great. This could pair well with a Max outfit for one of the dog characters. If you cant get an official IP Collab, maybe just call it "Green and Grumpy" or something, and make it loosely look like the grinch, as a fun little nod toward the character.
I also would like to be able to pick a "favorite" character in my locker, and then have that character show up on the main menu and the quick play screen instead of just the default Nemo, and when in a party with others have each of our favorite characters with their equipped skins show up together on the couch.