World Prediction List:
-Land of the Dead (Coco)
Sticking with the theme of death and the afterlife, Coco just fits this game like a charm. It's probably the most likely new Pixar world that will appear in the game.
-Toy Box (Toy Story)
I think it's doubtful they don't bring Toy Story back. It's Pixar's most beloved property and there's a ton of potential still. We still haven't seen Jessie or Bullseye, for instance. Plus, they could reuse many of Toy Box's assets to speed up world development.
-New Orleans(Princess and the Frog)
A terrific film that has only grown in prestige since its release. New Orleans and the Bayou are unique locations that could have a ton of opportunities for fun gameplay. Plus, it would be nice to fight a Disney villain. Dr. Facilier would be a great villain who would utilize voodoo magic and shadows.
Frozen is still massively popular in both Japan and the West. The fact that there's a sequel with a brand new location makes this world reappearing all the more likely. They could reuse many of the assets from Arendelle to speed things up. This world and Toy Box are the most likely to return.
Moana is one of the most popular animated films in recent years. It is frequently one of the most streamed movies in the world, and its ocean-based mechanics would make it an interesting world to traverse, sort of like The Caribbean
That forest in the trailer looked familiar. The metal foot looked a lot like an AT-ST. Either way, Star Wars is one of the biggest franchises in the world. It was bound to show up in Kingdom Hearts at some point.
Disney's other massive franchise. It's pretty much an inevitability at this point, the real question is how it will be done. Which characters to focus on? Which locations to feature?
This world could appear as a full-fledged world, but I could also just see it as a cutscene like Radiant Garden. We'll say 50/50.
Other Strong Possibilities: Zootopia, Indiana Jones, Avatar, Incredibles, Encanto, and Wreck-It Ralph