The rumors that it's being developed by a team spun off of the FFXIV group, which is where most of the XII people went. I wouldn't even be surprised if Matsuno himself were involved (as a scenario writer or concept designer, not a production director), he's already been working with the XIV team lately
Yeah, I've heard rumors that XIV team may be "gifted" the mantle of the next FF for saving Final Fantasy's reputation single handedly after the trash fire that XIII/XIII-2/LR/XIV OG. It would be well deserved. Problem is, they've got an mmo to keep going and those are time demanding. Another thing to consider is that SE always wants an MMO running to keep the engines well greased. So when the XIV team will have time to develop a single player on top of their wildly successful MMO has yet to be seen.
Yoshida will likely replaced with a successor and he'll take charge of a new single player team forced with key XIV staff.
edit: Another benefit of XIV team making XVI: AMANO DESIGNS

One thing I love about XIV is that it takes the visual aesthetic of Amano and applies it to 3d. For the first time, Amano's art can be treated with justice in Final Fantasy with their full splendor.
My hope is Amano will come back and design although I don't expect it. Akihiko Yoshida's 14 designs are so Amano-esque I wouldn't mind if he's the designer. Yoshida <3 Hell, the new Dream Team is Gooch/Amano/Uematsu all on one project together again. Uematsu has not made music for a single player FF since his contribution to X's soundtrack so it'd be nice for him to return.
All the potential is there for XVI to be a massive rebound for FF. It legitimately excites me.