Why not Crash bandicoot? Or Tomba? Or Croc? or any real classics rather than things that'll probably never happen because Square Enix is stingy with their copyrights?
EDIT: Ooh, and maybe a level based on Shadow of the Colossus.
EDIT^2: and maybe one of the main characters from any Atlus Game. They're pretty cool people.
This is my reasons for Kazuya Mishima. He is the fixed protaganist in the first two TEKKEN games, has a higher fan popularity, and has been the heart and soul of the game since the beginning. Also, his combos are much more well known then his father's. Like the gate of hell and his lightning punch