I think the trailer, if it was stand-alone, would be fine. But it isn't stand-alone. There was the movie on which it's based, and the apparent lack of creativity Gearbox has put towards the game is astounding. It's like they didn't even take the time to think about the universe or explore the myriad possibilities they had in front of them, and instead just watched Aliens and said at the beginning of every scene "We need to figure out a way to shoehorn this into our game". Yes, everyone quotes and cites and loves Aliens to death, but so far it seems like they've taken a far too literal approach to transferring that into a game.
And I've asked three times already, and still no one can provide an answer as to how there's still a Hadley's Hope at all when a gigantic fucking nuclear explosion went off a mile away.