It is not publicly known but my sources tell me what the official release date of FF X HD will be.
Features
-fully remastered he game using the ffxiii engine
-online multiplaer for blitzball (if wanted)
-all bosses and extras unavailable in America before but available in the international version
-FF X2 possible dlc
-trophie support
- and more
This game is to be released on December 31, 2013 for ps3 exclusively.
It will be one of the last games to be released before the ps4 release