someone should make super smash bros but public domain characters. winnie-the-pooh and frankenstein's monster fighting sherlock holmes and the protagonist of night of the living dead
You could also do Brawl-style Masterpieces! How much of A Study in Scarlet can you read before the five minute timer is up? We started you on chapter 2!
Seriously though packing in original media in a readable format would be pretty cool.