Though I liked what I saw, it seemed much more like a "teaser" than a trailer. It's barely over a minute in length and the excessively long title and large amount of black space at the beginning made me depressed when I saw that a quarter of the trailer was over and I had yet to see any actual footage. The clips that were used, I feel, didn't do as great a job in conveying the great gameplay of DA as I would have liked, and I could see how someone could simply dismiss the game as being another generic shooter based solely upon what is shown in the trailer.
If there's time, I would really encourage the creation of a longer, more drawn-out trailer that showcases the action in a single map. If anyone remembers the trailer for Tactical Ops beta 2.0, you'd have an idea at what I'm getting at. A trailer showing the preparation of the defences seasoned with the occasional communication via a radio message and the subsequent silence before the storm, followed by a plethora of action clips of the battle, I feel, would be much more satisfying than the five clips shown in the trailer.
Sorry for sounding a bit harsh. I have no doubt the game will be just as fun as its predecessors. I simply didn't care for the trailer all that much