Honestly my words won't be able to describe the clip as well as just watching it. But if you still have yet to skip past my words to the video, let me sum it up.
It is a perfect montage of scenes from the game showcasing just enough of the game to get one excited and not ruin the story. You know like the way that a good movie trailer does. You know, suspenseful music, just enough action and dialog to make you question what is happening, the standard trailer fair. But I will also say that it has grabbed my attention more than it had before this. It almost makes me want to play through the first so I can pick up this one at launch and not be confused. Which if you know me, that is completely saying something.
Enough of my rambling, since I am sure these words are falling on blind eyes. Enjoy the new trailer.