Metal Gear Solid V: The Phantom Pain isn't far off now, and the game's Twitter page has been awfully active.
Thanks to those responses, we now have a few more details (which you can find summarized at GamingBolt ).
First, the developers confirmed that the story mode in MGSV will indeed be longer (as anticipated) than in previous franchise entries. And of course, the inclusion of side missions will add to the longevity. Second, we find that Snake can't swim; he can only walk through shallow water. Third, it seems his iconic eye wear might be customizable; currently, different outfits change his eye wear but players can't change it individually (yet).
Lastly, if you want to play and build your own Forward Operating Base, you'll need either a PlayStation Plus or Xbox Live Gold membership. You will be able to customize that FOB offline but to actually use this element of the game, you need to be an online subscriber. Seems like a requirement in some way for almost any game made these days, but whatever.
Metal Gear Solid V: The Phantom Pain should rock your world on September 1, when it will launch for PlayStation 4, Xbox One, PlayStation 3, Xbox 360 and PC. And by the way, Konami recently confirmed the tech specs for the game.
Related Game(s): Metal Gear Solid V: The Phantom Pain