The character who I really don't want to be the last character is Sora. I've been betting too much against him because he's owned by Disney, and his games are full of movie characters. Hopefully when the last character comes and it's not him, and he doesn't even get a Mii Costume the Sora4Smash hype could finally die. If he does end up as the last character, I would still play as him because I love Kingdom Hearts, and for the WTF factor of a Disney character in Smash, but then I would be requesting Goku, Starkiller, Android 21, Galena, Mickey Mouse, Chase McCain, Batman, Harry Potter and Lord Vortech for the next Smash game.
Another hyped character I don't want would be Ryu Hayabusa. We already have a Ryu in the game. Sure, they can get around it by just calling him Hayabusa, but I prefer the Dead or Alive ladies.
And I don't want anyone from Mario, Pokémon, Fire Emblem, or any franchise that's already too overrepresented in Smash. We remember how it went with Byleth. Though my problem with Byleth was more about his game releasing too late for Fighters Pass 1 and not that he's from Fire Emblem. Though being a first-party in a line of third-party characters was also weird.
Some characters who I would LIKE to see include Crash Bandicoot, an indie rep, a Dragalia Lost character and Phoenix Wright. However, if it's Phoenix Wright, his moveset cannot copy the Marvel game he's been in.