September 30th
Apparently it's in fall 2014 but an official release date hasn't been announced
No, this game has been renamed Final Fantasy XV and there has been no word on release date. My best guess would be that the game will be released in 2016 for Playstation 4 and possibly Xbox One.
Noctis is the main protagonist of the unreleased game: Final Fantasy XV
is now Final Fantasy XV. might finally be released on PS4/Xbox One in 2015...
It would undoubtful, as they are currently making Final Fantasy XV. However Square Enix is re-making, in HD, Final Fantasy X and X-2.
Apparently an estimation has been released that it might be released on 31/07/14 but that's subject to change, so for now it's on that date.
The next game in the series, Final Fantasy XV will be much more action oriented. Probably not the same as you are describing, but about as close as we'll probably ever get.
The date 15 05 2008 translates to XV V MMVIII in Roman numerals.
XV-VI-MMVI
It is: X-XV-MMXII
Universal Newsreel - 1945 XV was released on: USA: 22 February 1945
WrestleMania XV - 1999 TV was released on: USA: 28 March 1999