Square Enix caused concern when they suggested Kingdom Hearts III would be up to three years off. The shortage of news since implied this suggestion was true, but during the D23 Expo Square Enix put it to rest.
Kingdom Hearts III is coming in 2018.
The trailers for the game showed off the Hercules world but more importantly revealed a brand new world: Toy Story, with Woody, Buzz Lightyear and all.
Kingdom Hearts Director Tetsuya Nomura discussed the addition of Toy Story:
At long last, we are excited to open up the KINGDOM HEARTS universe to include the world of Disney•Pixar’s Toy Story. I’m sure fans have been anticipating the inclusion of this world for many years. The narrative will be an original story exclusive to KINGDOM HEARTS III, and the gameplay will feel characteristic of the Toy Story style and aesthetic. Please stay tuned for more details to be revealed soon.
Don't hold your breath, but it looks like Kingdom Hearts III may finally arrive on the Playstation 4 and Xbox One in 2018. You can see the new trailers below: