If you have participated in discussions about Kingdom Hearts 3, you must've at least viewed a couple of fan-made endings.
Square Enix has confirmed that Kingdom Hearts 3 will feature a bunch of nostalgia-flavoured mini-games inspired by 1980s-era LCD gaming. These were The Karnival Kid, The Barnyard Battle, Musical Farmer, and Giantland.
The games of course take inspiration from classic LCD games from the 80s, much like Game & Watch.
As for a release date, Kingdom Hearts 3 is supposedly due sometime this year on Xbox One and PS4, however no solid release date has been set. There has been no official confirmation from Square Enix about the release of the highly anticipated video game either other than a very vague and non-specific 2018 release window. Seeing that Kingdom Hearts' offerings are largely similar to Final Fantasy, we can assume a similar outcome for the Disney-themed game.