Music by Gazelle Twin to be used in Prometheus promo video

Alien Prequel news posted this story about music to be used for a "promo film" for 'Prometheus'.... "British electronica musician Gazelle Twin (aka. Elizabeth Walling) has revealed in a recent interview and on Twitter that a track from her latest album, 'The Entire City', will be used in a promo film for Prometheus. In the interview posted on John Foxx' official website, Metamatic, she says: "... fortunately, I recently learned that a short track excerpt from The Entire City is going to be used in a short promotional film made for Prometheus, the new Ridley Scott sci-fi epic. It's huge news for me, not only as a life-long Alien fan ..." Exactly what this promotional film is, and how and when it will be presented is still a mystery. Although, looking back at the countdown teasers Fox released ahead of the official trailer, it's quite likely they'll do something similar before the Prometheus premiere. Gazelle Twin hasn't stated exactly which of the tracks from her album will be used on the promo, but her album is available on Spotify and a couple of tracks are on YouTube if you do a search." My question is....what's with this "promo film" exactly and when will it be released?