The biggest problem I have with the Playstation 3 is the retail price I'd rather wait until 2015 because then I could get the PS3, FFXIII, FFXIV, and FFXV at a cut throat price.
The only way I would buy KH III is if Square Enix decided to turn the storyline into a prequel instead of a sequel because I haven't even completed the first Kingdom Hearts so I wouldn't understand it's second sequel Kingdom Hearts III.
(I couldn't beat Captain Hook I got through two stages of the boss battle and I died. Eventually I gave up and sold my copy of the original KH to Gamestop.)