I had mixed reactions to the trailer. The graphics, environments, and overall presentation were a mild step up from the first, but the gameplay looks largely the same. It looks like you're still fighting the same enemies with the same weapons and they even recycled the idea of a train mission. The human (locust?) shield thing was new, but that seemed to be about it. I guess it's pretty much what I expected. I mean the first game was good, but very very simple in concept (running through linear narrow corridors fighting through wave after wave of enemies), and I don't think there's really enough to go on to stretch the series out much longer.