Take this news however you want but here is some info on KH4. Some of this will piss people off or make them understand the direction of this game.
Game will be episodic like FFVII Remake
This is due to worlds being much bigger than part 3 with more to explore and have more story for each world
Stories for each world won't feel like a Cliff's note version of the movie or characters
They are looking at it being 2-3 episodes long but it's becoming more clear that it will be 3 episodes
12 worlds will be included plus three original story worlds
According to meetings, this was decided by Nomura since he wanted to expand the worlds even more since the third game and felt enthusiastic about world and story design
Disney writers are helping with story in certain worlds makinf sure characters stay true to their original works (Which is ironic given how current Disney is right now)
But I do hear that final decisions is between Nomura and an old Disney writer since Disney is throwing everything at this game to help make sure nothing is messed up knowing how their current projects are not doing so well
Mobile game tie in events will be updated in between release of episodes to not make the fans feel like too much of a wait
FF characters are there
Cross save progression is happening between episodes similar to the .Hack// games
That's all the info I got. Believe it or not, it's up to you. But being episodic might piss people off or not. Especially given the current state of prices of video games.