Square-Enix has had problems in the current gen, I suspect that the company couldnít adapt Final Fantasy and other IPs to the HD era. Moreover, the first version of FF14 was a downfall, this game forced to stop the development of other games to focus in the rebuild of FF14. Really itís like a new game.

Square-Enix announced Final Fantasy Versus XIII years ago and the game was lost in the limbo. Square decided to halt Versus PS3 development two years ago, but the RPG wasnít cancelled, why? Two years ago, Square-Enix moved the game to PS4 and Sony got in the project.

Actually Sony is co-developing the game with Square-Enix, therefore, this game will be exclusive on PS4.

Square-Enix renamed Versus to FF15 in the middle of this process. Sonyís studios are helping SE with FF15 assets among other tasks.

We hinted this PS4 exclusive one month ago, but we couldnít speak freely about this topic. Now, itís all that we can say.
Source

As expected.