NoirSon on 12 June 2013
If things turn around for the Wii U, it probably could get a Kingdom Hearts game but I don't think it will be KH3, due to the fact that it is being built around the hardware of the Xbox One and PS4.
I'd be surprised if Square Enix, didn't make another Kingdom Hearts game for either the 3DS or Vita though, the fact is that in Japan, the portable systems are Kings and while they have started to see better sales for the PS3 as prices have come down, it is unlikely that the slow adoption and software sales with home consoles in Japan is going to change for the PS4 anymore then it did for any of the home console systems since the PS2 era.
