The first half of the trailer is a collage of footage from the other games in the series. It seems like Metal Gear Solid V: The Phantom Pain is trying to tie up the loose story threads form the series. The game looks great and the story seems very interesting.
Metal Gear Solid V: The Phantom is an upcoming open world action-adventure stealth video game developed by Kojima Productions and directed, designed, co-produced and co-written by Hideo Kojima.
The game serves as a sequel to Metal Gear Solid V: Ground Zeroes, and a continuation of the narrative established there, and will carry over the same tagline of Tactical Espionage Operations first used in Metal Gear Solid: Peace Walker. Set in 1984, the game follows the mercenary leader Punished "Venom" Snake as he ventures into Afghanistan during the Soviet–Afghan War and the Angola—Zaire border region to exact revenge on the people who destroyed his forces and came close to killing him during the climax of Ground Zeroes.