Originally Posted by Aquamarine
Kojima Productions is already outsourcing one MGS title to Platinum Games, so From Software developing MGS: V is definitely a possibility here.
It might stem from the fact that Kojima wants to work on different types of games. So Ground Zeroes could be his "experimental new project," while MGS: V could be more a traditional kind of thing.
Coming at it from that perspective would make sense.
Although I would think that Kojima would want to be on the main thing. However he has said that he wants to get away from Metal Gear. Maybe this is his way to get away from it while still making a Metal Gear game :p