It looks (I hope) to be part of the general concerted effort for an organised continuity.
Alien The RPG Corebook, Chariot Of The Gods, The Destroyer Of Worlds, Colonial Marines Operations Manual, Cold Forge, Into Charybdis, Isolation, Fireteam, Phalanx and so on.
But as it's a one shot I don't expect it to be the start of a larger story.