Secret mystery solved - Ground Zeroes is a (probable) 10 $ download title coming to xbox 360, ps3, xbox one, ps4 sometime in 2014. It is essentially the first chapter of MGSV by itself.



Phantom Pain is the main game , like chapter 2-8 of MGSV and at some point it was planned to come to both current and next gen systems I feel like the current gen versions will get scrapped and it will be a next gen only game. It also won't be out until 2015, maybe summer ?



Also, someone above hit the nail on the head I think, Kojima won't be making the next MGS because it'll be MGRising 2 also a next gen exclusive coming 2016.



Eventually there will be a Metal Gear Solid 6 though, and Kojima will do it.