The Dark Knight Teaser Trailer Analysis

This trailer is more graphically made, and has no visual of the film at all. It is a black background with blue lights flashing out randomly, hinting towards the outline of the Batman logo. Eventually a white light is shown behind it making the logo visible as it starts to break up. As this happens the camera shakes as if there is some sort of explosion going on behind causing it to break up. At the end there is use of black outs and fading to show the title of the film and also the release date. 
You can tell that this is an action/thriller by the dialogue voiced over the visual production. It gives away the typical good guy/bad guy theme. You can also get that Batman is up agaisnt a villain, the Joker, which tests Batman's stregnth. I think you can understand that by the way the Batman logo breaks up as the Joker begins to talk over.