I don't know if this is even relevant, but FFVII characters like Cloud, Aerith and Yuffie appeared in KH games on Nintendo platforms. I remember than Aerith is also set to appear in Theatrhythm (or whatever it's called) as well, with One Winged Angel featuring as well. To me that implies that Sony doesn't own the rights to FFVII, or at least the characters and music.
That's not to say I think FFVII 3D is likely. I would personally love it to happen though, I thought the DS remakes of III and IV were fantastic and would love to see V, VI and beyond done in a similar fashion.








