Edit: Game's been unveiled as MGSV: The Phantom Pain. Ground Zeroes is the prologue, after which Big Boss slips into a 9 year coma and awakens during the second chapter, The Phantom Pain. David Hayter isn't voicing Big Boss. Trailer's all in real time and looks phenomenal - due on Xbox 360 and PS3. Gameplay was also shown of the events around the first Phantom Pain trailer, where you're escaping the hospital as a barely functioning Big Boss.