During the Disney Interactive event at D23 Expo 2015, a world based on the movie Big Hero 6 was announced for Kingdom Hearts III! The story in Kingdom Hearts III will take place after the events of the movie. The subplot of the world will involve Heartless taking over the Baymax that was left inside the portal from the end of the film. The following image is concept art created by series artists, which showcases Sora riding on the back of Battlesuit Baymax.
Roy Conli, producer of Tangled and Big Hero 6 also shared a message saying how thrilled he is to be featuring his movies in Kingdom Hearts games, and that he loves the connections the movies and the Kingdom Hearts series share. You can check out his video below.