My top 5 wants (of films that haven't been included as worlds yet):
1. The Princess and the Frog ~ The Crescent City. The environment for this one would have a nice mix, I think--a graveyard and back alleys where you fight Facilier and the shadows at the end, the swamp of course (including Odie's house and the spot where Tiana & Naveen are married), as well as the town area where the church is as well as Facilier's house and Tiana's Palace restaurant.
2. Raya and the Last Dragon ~ Kumandra. The desert area where the present part of the story begins is the part that I would most look forward to exploring, but this one has a huge locale.
3. The Sword in the Stone ~ Camelot. I think this one could be really fun. I'm thinking of a world that is fully accessible--I mean in the sense of water, land, and air. If you go into the water, you become a fish and explore a huge water environment, then a land environment with the castle and woods, then some trick (sort of like the little flowmotion commands) where you can become a sparrow and fly in the sky (and that's the only way you can access Mim's cottage. I think they could leave it at the fish / bird changes and leave out the squirrel one. Mim would be a fun boss.
4. One Hundred and One Dalmatians ~ No idea what they should call it--World of Barks / Dogs / Spots, one of those maybe? Cruella would seem like she'd be a weird fit with KH, but they've done more with less before. They killed Cinderella's stepfamily, for example, and then the Fairy Godmother was pretty awesome in MoM. Another ice world like Arendelle.
5. Bambi ~ The Great Forest or The Great Wood, something like that (playing off "The Great Prince of the Forest"). I just remembered somebody had once called it The Noble Wood--that sounds nice, too. I think it's another one with real potential to be as good as Symphony of Sorcery, for example--a sort of otherworldly world. As long as it's treated as more mystical and silent where you don't really talk to Bambi (or only very little, anyway), and less conversational and comic as, say, something like Pride Lands would be. It would work as a world where Sora is alone, or perhaps one with serious drama happening with the original story, for example. As one of the last worlds in the game leading up to the ending world perhaps.
I was going to say Treasure Planet as #5, but I think the only thing I'm really looking forward to that one for is to have Jim as a party member. But there are so many. And so many I'd like to see again, too.