Honestly, I thought this meant Disney "Boss," as in people who have been some of the head execs or bosses of the company, and which of them we would like to fight in the game. (In which case, I wanna beat up Walt but that is an entirely different subject).
Eisner had it coming.
#1-Elsa. Maybe she's corrupted by Maleficent, maybe SDG take the place of the soldiers sent after her. Either way this boss has to happen, Hans is too much of a pussy to work. I like Square to go further with her ice powers than they did with Vexen, not just large icicles but various ice constructs like barriers, weapons, or imprisoning party members in ice cages. Go all Green Lantern with her magic.
#2-Lady Termaine. I've envisioned 2 different fights with her: A. The player is shrunken to mouse size & is running around on the dining room table. Termaine spots the player, panics & desperate tries to kill him with the nearest sharp utensils she finds. B. involves the plot of Cinderella 3, in which Termaine gets a hold of the Fairy Godmother's wand & all of it's polymorph magic. In this fight she doesn't have much HP & doesn't really attack directly but creates new minions to fight for her & a carriage she takes cover in.
#3-Omnidroid (Incredibles). This boss idea is a response to Nomura saying there'll be improved AI, as AI is the whole theme of this battle. The longer the fight goes, the better the robot gets at defending against different player strategies, forcing the player to keep trying something different. Basically like AC's Mr. Freeze.
#4-Darth Maul. & here we are with the controversial pick. IMO New Hope is problematic as a world: the Death Star would have to be destroyed & thus isn't explorable after the completion of the story. Also Vader is an extremely slow moving chap, agonizing for a fast paced game like KH. Backpedaling to Episode One we get Maul, who can literally do everything Vader can
plus is way faster & more acrobatic. He even has his own ship too so there'd still be a gummi boss option.
#5-Snake Jafar-Jafar's the favorite Disney villain & while we've fought him a ton already, I'm disappointed there has never been a fight with his Snake form.
#6-Gaston-Nobody gets overlooked by Square like Gaston!