I vote meh. Nothing in the trailer I hated, but we pretty underwhelmed, by what I saw. It's ALIENS in the woods from what I can tell. No sense of wonder or mystery. People go down find xenos, they die, the end. Some new xenos are thrown in the mix for variety. I understand wanting to give people what they felt Prometheus was lacking, but this feels like they've swung the pendulum too far in the other direction and removed the grander story for more Alien action.
Of course this is only a trailer. Could be the movie is entirely different from what the trailer is selling, I'm just not into this so far. Doesn't feel ALIEN to me.