I wish we knew more about the current structure of Studio Japan kind of like how we knew how Nintendo EAD was structured. It would give us a better idea of dev timelines for speculation purposes.
And since this thread is kind of going in circles without any new rumors, I'm going to speculate...
Last we heard is that Studio Japan is around 400 people... And assuming there is a legit structure to the studio... Keep in mind this 100% conjecture
(Team, current project, complete approximate guess as number of employees)
- Team Ico* - The Last Guardian - 50
- Team Gravity - Gravity Rush 2 - 100
- External Dev Group - Overseeing external projects - 30
- Tech Group - Playroom VR and tech demos - 30
- Mark Cerny's Team** - ?? - 20
- Administration/HR/Maintenance - 20
- AAA Dev team*** - AAA JRPG - 150
So that's ~ 400
*: Shu has said that The Last Guardian team isn't really that big
**: Mark Cerny has said that he's working on a new game with a smaller team
***: This is assuming everyone else in the studio is working on this hypothetical game. It's possible a lot are while the rest have another smaller game in the works
Thanks to anyone who reads this that I pulled from my ass lol