Zurg is very popular, it seems. Thing is, I can certainly see him as a boss, and with the high chance of Toy Story being in KHIII, all we need is an official confirmation.
The idea of chasing Cruella in a car for a boss battle is both hilarious and Epic sounding at the same time. Unlikely, but it sounds awesome.
Horned King is another popular one. I haven't watched the movie in a long time, but from what I remember the movie set a very Dark tone. If they add Toy Story (which would likely be a light hearted world), then this would be the perfect balance. Considering the mood Enchanted Dominion (Particularly Maleficent's Castle) had, it's very possible, and can be done.
Sher Khan (Who I'm guessing is the tiger who ran with his flaming tail between his legs after the first movie) is the same case as Zurg, only even more likely. Why? Because there was world Data for the Jungle Book world in BBS, meaning that since they weren't able to stick it in that game, they'll do everything they can to stick it in a future game. Perhaps KH3D, seeing as reports state there will be brand new worlds in that game?
With Merlin appearing in Radiant Garden all the time, I would not be surprised to see Madam Mim pop in as a sidequest or something (For comedic value). The boss battle would be fun. She'd probably have multiple forms based on all the animals she turns into.
On the Subject of Final Fantasy, let's face it. SE has gone to both extremes with the FF characters. Minimal (BBS and 358/2 Days. Heck, 358 only had the Moogle.), and Maximum (KHII. At least, that's the game I hear most of the FF-Clusterfcuk complaints come from). For KHIII, I'm betting we'll see a number of FF characters (In Radiant Garden, mostly). I'd like to see Genesis myself, but his best bet was in BBS, and it was passed over. Having him show up in KHIII with no Zack around and Sephiroth taking center stage (Let's face it, Sephy will return. It's only a matter of time.) wouldn't work well, even as a secret boss. Kefka, on the other hand, would work very well. A secret boss raising havoc in Radiant Garden, and Sora and Co. have to put him down. His erratic magics would make for a furious, fast-paced, and overall epic boss fight. Say yes to Kefka! Not many other FF characters can show up without many complaints. Except for Ultimecia. Squall's in Radiant Garden, so that too is only a matter of time...
On the Subject of Vanitas. Epic, yes. Likely? No...Even the secret boss potential is slim. Storyline potential is moot, seeing as he's reformed with Ventus and probably won't show up again as a character without MX creating a weird Clusterfcuk about it, and I just don't see that happening. The best people can hope for is that Mr. Vanitas Remnant is still alive and kicking after 10 years of solitude in the Keyblade Graveyard...and I tend to doubt that.
On the subject of Original Bosses in general...MX is confirmed by the Re:coded secret ending. What exactly he will do is completely Unknown (at the very least, unconfirmed). Braig would be awesome, but we'll have to give some thought as to how he does return. Mysterious Figure is likely, unless we find out his identity in KH3D/The Mystery Game, which then would render him less likely because Sora and Co. will probably kick his @$$ halfway to The World that Never Was once they see him. If he is Xehanort's new accomplice, anywho...Speaking of which, the Accomplice is 100% probable. Because even if we figure out who HE is in KH3D/The Mystery game, I'm sure Xehanort will try to keep him around. Can't lose and grab another henchman every game. Then you run out of ideas.
That's my list, with a ton of detail in certain segments. Enjoy, Comment, Rant, eat a Banana...whatever suits your fancy.
