The Kingdom Hearts option is a cheat, since Kingdom Hearts includes Final Fantasy girls- presumably the universe would include all characters from all Final Fantasy and Disney worlds/games, plus the original Kingdom Hearts characters.
I've been thinking about that. But I wouldn't be able to include all the characters I would like in one single drawing :/. So I've decides to dedicate to one single. Besides, there are no KH characters in the Dissidia games x).
True enough, but the original Dissidia game was comprised only of characters from the Final Fantasy games; so, given the mythology of Kingdom Hearts, there's probably a Dissidia World floating somewhere waiting for a Keymaster to come in and unlock it.