According to VGLeaks, Final Fantasy XIII Versus, which was previously thought to be in development hell, had actual development stopped so that they could move the project to the PS4.

The other side of this is that its rumored that Sony will be co-developing FFXV and that will make it a PS4 exclusive.

Take all of this with a pinch of salt as it is still a rumor but VGLeaks release accurate information quite often.