Siegfried (SoulCalibur 4)
Raiden (MGS)
Saki (Sin and Punishment)
Aqua (KH:BBS)
Slippy "MotherFockin" Toad (Star Fox)
Zack Fair (Crisis Core FF7)
Zack (Zack and Wiki)
Wind Waker Ganon (TLoZ: WW)
Adult Goku (Dragon Ball Z)
Meh.
I haven't played Megaman Legends, but previous Volnutt projects have convinced me that he could be a fun character.
I really like that he actually fits in the Brawl roster.
I'm sad to see Arthur go...If Pichu hadn't had a PSA Arthur definitely would have gotten my vote.
I have a few other character suggestions that I'd like to get others' opinions on:
Perhaps if enough people like one of them, you could consider adding it to the poll.
EDIT: Also, I'd like to see you make a stage, but honestly, we have plenty of stage hackers- you're one of the few character hackers.