Coco would be an amazing world for this game. It’s literally about using music to spark memories.
@Zip I agree with you wholeheartedly,
Coco is most definitely a shoe-in for the next KH game, due to the themes the film (remembrance, death, etc.) had and Héctor interactions with Kairi so he can reach his daughter Coco.
It's likely that the story for the Coco world and the first for and Pixar-based world in the KH series is that it could be a prequel to the original movie where Kairi ends up in the land of the dead trying to find her way back to look for Sora and she encounters Hector who also wants to cross the bridge to reach Coco, which can also tie into Kairi's character development.
Besides the connection of Family (la Familia), Remembrance and memory which were the themes of the original movie and could connect with Kairi's character development and the KH plot, the alebrijes could be another important story plot connection for the world cause in the original film they are meant to be spirit guides to their owners and their families such as Dante and Pepita. What if there were alebrijes that became corrupted and turns itself into a Heartless or Nightmare Dream Eater and actually do the opposite? I could so imagine the world culminated with either a Heartless or Dream Eater boss based on the Mexican deity, Quetzalcoatl with Kairi riding on Pepita and battling the boss in the vein of Sora riding on Baymax and the Magic Carpet.
But hey, I'm very excited on how Pixar and Square Enix will come up with the new story for a world based on Coco. Another interesting thing to note is that apparently Jason Katz who worked on the
Toy Story movies and was one of the consultants with the
Toy Story world in
Kingdom Hearts III also worked on
Coco, plus Jason, Adrian Molina and some of the people who worked on the movie could serve as consultants giving notes to the Nomura and his team regarding on the Coco level. Coco definitely screams Kingdom Hearts level from both the environment, the story, the alebrijes and potential boss, so I'm very excited to see Square recreate it as a level.
Potential Heartless or Dream Eater Boss:
I also would like to see Dante again. Even if he is more attached to Miguel (as he was the one who named him) he does reside in the Land of the Dead and maybe his encounter and curiosity with Kairi could somewhat mirror his relationship he had with Miguel in the film.
I also think
Inside Out would be another Pixar film that can work for this new game, given that portions of the film do focus on emotions, memories and dreams.