Square Enix Announce Final Fantasy VS XIII Is Now Final Fantasy XV, Now Coming To PS4 And Xbox One

Square Enix have announced Final Fantasy VS XIII is now Final Fantasy XV. the world and story will continue to be developed from what was in Final Fantasy VS XIII, but now Square Enix are making use of the next gen tech to improve the action, gameplay and graphic quality.
  

Story of FINAL FANTASY XV
"The armed forces of Niflheim launch a devastating assault upon the Kingdom of Lucis, casting Crown Prince Noctis and his comrades out of their homes and into the fray. The engaging tale to follow draws audiences into an awe-inspiring world steeped in the rich storytelling traditions of SQUARE ENIX’s renowned First Production Development team."

Press Release

Square Enix Have Officially Released The Japanese Trailer For Final Fantasy VS XIII

Square Enix have officially released the Japanese Final Fantasy VS XIII Trailer. it is best viewed in HD, available from the player, and shows a mix of in-game action and cutscenes.