What mystery do you most want to be resolved or or headcanon confirmed?
I'm dying to see the genesis of Ansem SoD's guardian. I've my suspicions, but I would love to have it settled.
But every Kingdom Hearts save the first and coded has had multiple playable characters. "Only Sora" isn't even on the table.
I'm dying to see the genesis of Ansem SoD's guardian. I've my suspicions, but I would love to have it settled.
I'd rather have more than three simultaneous characters, frankly. I think that the days of memory limitations dictating a smaller party size are at an end, and games can balance themselves perfectly well to adjust to bigger or smaller party size, IMO (and both KH1 and KH2 have you move between having one, two, or three party members just fine - no reason that number can't go above four).
As for multiple playable characters, I think I'd love to see multiple campaigns. And to be completely crystal-clear, I expect it *in some form*. Every single Team Osaka game so far has had multiple playable campaigns (Re:CoM, BBS, and DDD), but the implementation of that has been different each time. Re:CoM has one campaign unlock after you finish the 'main' game; BBS lets you choose between the three campaigns right from the start, but unlocks a concluding chapter in a manner not too dissimilar from the way that Reverse/Rebirth gets unlocked; DDD interweaves both campaigns through each other).
However, as much as the Team Osaka games have historically had multiple campaigns, it's also worth noting that the numbered KH entries have not. Both of those precedents are important. We'll have to wait and see how KH3 handles things.
IN TERMS OF GAMEPLAY, though, I definitely wouldn't be surprised if the game gives us the ability to toggle between which character we're controlling. Would this result in playable Mickey/Donald/Goofy/world-specific Disney assists, though? Would only Keyblade wielders be playable? It's hard to say.
But every Kingdom Hearts save the first and coded has had multiple playable characters. "Only Sora" isn't even on the table.