Its been confired that this "sets the scene" for MGS5, only thing I'm hoping for is that they don't come p with some dumbass way for Snake to be young again :-/
This game takes place before the first Metal Gear game and after Peacewalker. If it is setting up the stage for Metal Gear Solid 5 it doesn't nessesarily mean that its going to continue the story of Solid Snake. I mean Metal Gear Solid 2 followed Solid Snakes story. but Metal Gear Solid three went back and explained Naked Snakes story. I'm almost certain that we will be playing Metal Gear Solid 5 as Naked Snake. not Solid.