Hiroyuki Ito (Director FF6, FF9 and FF12) hints that he's working on FF15 in recent interview

[Galvanizer]

A203D said:
Galvaniser, I don't know if you heard but Matusno left Level 5 after he finished Crimson Shroud.

It's possible a return to Sqaure Enix is on the cards...

Maybe he is returning to Squenix to remake Vagrant Story or work on FFXII HD.