Its probably Final Fantasy VII. I don't think that KH has as rabid a following amongst the press core as that game, though I could be wrong.
Btw here are the publishers who have published the titles.
Publisher(s) PlayStation
JP Square
NA Sony
PAL SCE Europe
INT Square
Windows
Eidos Interactive
PlayStation Network
Square Enix
So, if Square Enix published in on PSN and Eidos published on PC then its quite possible that they have the publishing rights. They could easily do what they want by twisting Sony's arm if they don't. "You want me to go back on stage next E3 and announce both FFVXIII and FFXIV for Xbox 360, mate?"
Tease.