"One of the reasons I left Sega was, if I stayed there, I would have had to just make Sonic games. Right now I don't have to make Sonic anymore, so I'm enjoying that freedom a lot. ...Like with Nintendo: Miyamoto has been making Mario games. He's under that too. He has to keep on making Mario games. [Eiji] Aonuma has to keep making Zelda games. [Hideo] Kojima has to make Metal Gear games. I wish he could take that off of everyone's shoulders so they could create other stuff, like new stuff. Because that's healthier for the industry. Movie directors create all sorts of movies, and the movie industry is healthy. I wish the game industry was like that as well." - Yuji Naka

I'm pretty sure Miyamoto can do whatever he wants. We should be seeing something about his new projects in 2013. As far as Aonuma and Kojima, Naka might be right about that.