The trailer does not show a lot but gives a glimpse of what to expect from the game story, where the Man in the Golden Mask can actually control the black muddy "thing".
The Man in the Golden Mask is a new character, and Troy Baker will be the voice behind it. This is the same guy that was the voice behind Samuel Drake in Uncharted, Magni in God of War, and other previous and upcoming games and movies.
In addition to Troy Baker, Kojima has also introduced a couple of other actors, like Tommie Earl Jenkins, who will give voice to the leader of the player's organization. In Japan, the same character will be voiced by Akio Otsuka, the guy that was the Japanese voice of Snake in Metal Gear Solid.
These new actors will be joining the vast list of names like the Norman Reedus, Lea Seydoux, Mads Mikkelsen and Lindsay Wagner.
Unfortunately, there are still no details on the release date or any other details, other than it will be using the Decima Engine from Guerilla Games.