The previous Kingdom Hearts games have not been known to have demos but to get players more into the upcoming release on January 29, 2019, it would be nice to try out the Kingdom Hearts 3 ahead of launch.
Sadly, there is no word officially or unofficially that a Kingdom Hearts 3 demo for PS4, Xbox One is going to happen. However, there could be a last-minute plot twist until the game’s release date.
If you do want to try the game out before it launches, you can also look at attending a big games convention like EGX, Gamescom or PAX.
We suspect that once the game has been released on Jan 29th there will be a demo on the store to entice new players to the franchise by offering them a little taster. Be sure to check back on this page for more as the information develops.