Disney and Square Enix, at the Disney D23 Expo, announced that Big Hero 6 will be part of Kingdom Hearts III when it launches. Shinji Hashimoto from Square Enix took to the stage to make the announcement in addition to showing off some of the progress, including an exclusive look at the concept art for Big Hero 6’s inclusion.
In Kingdom Hearts III, the antagonists will take on the powers of Baymax, but of course used for evil instead of good. More details will be announced later as developers work on the game.
It appears that Square Enix is eager to have additional crossovers with Disney, as it announced exclusives for the Disney Infinity 3.0 platform at the same presentation.