It turns out that the music that was used in the E3 trailer is not just from the song ‘Sins of the Father’.
Donna Burke, the singer and actress who is performing ‘Sins of the Father’ for Metal Gear Solid V, has posted some information on her Facebook page. We learn that the music in the E3 trailer is actually cut from two different songs.
She also got to play a bit of the game.
Source: Donna Burke Facebook