Unless he's teaming up with Squenix, he'll most likely not be working on any sequels from his heyday. I do remember a long time ago reading that the Tactics team, after finishing War of the Lions port, wanted to do a similar quasi-remake port of Vagrant Story. Since Matsuno was brought back for Tactics Ogre, maybe he was asked to step in for that.

I doubt he'll be asked to do another numbered FF entry, though continuing on Tactics Ogre/Ogre Battle is not too far fetched. He's most likely working on something original but I'm curious to see which company he's teaming up with.