If you were to personally design KH3, what would happen in the plot!
Ohhhh gosh. Well, I'm not very good at planning out plots, I'm a very spontaneous bounce shit off others and watch what happens kind of writer. But I can kinda tell you what I expect, and what I like about that and what I might change.
I pretty much expect Kingdom Hearts 3 to be Sora finally giving everybody a happy ending. Restoring all the hearts, restoring all the worlds, taking care of Terra and Aqua and Ven and Axel and Roxas and the rest of the Organization, everybody who'd been fucked over in the past, and finally giving them the ending they deserve.
I fully expect this to come at the cost of Sora's life. If not his, then Riku's as a sacrifice to save Sora's, or else them both like Fang and Vanille in FFXIII. Though I also expect it to resolve with a "just kidding" back from the dead by magic or Kingdom Hearts or whatever, though I wouldn't put it past S-E to kill off Riku for good. (This is pretty much the goon squad theory on the subject).
I'm a bit torn on this. Everybody knows how much characters like Axel and Roxas deserve to finally get that happy ending, and I think if it's played right it will be fulfilling. But it has to be played right. Otherwise it has the very real possibility of making light of everything they've been through and all they've suffered for each other. But I have faith that S-E can write this effectively.
The same goes for a potential Sora/Riku sacrifice. I think it can be written to be very powerful, butI think for it to be a proper end to the series it will have to provide that closure of a happy ending for Sora and Riku too.
But no if I wrote KH3 it would essentially be 80+ hours of Axel teasing Roxas and Roxas getting fussy and storming off and Axel having to chase after him and making him stop pouting with ice cream and then they'd sit around and make jokes and kiss and things
