I REALLY like this poster. It conjures forth the feeling of weariness and determination that is part of the Batman. Also, the background gives a somber mood -- it seems to suggest a city corrupted by pollution. The background suggests some sort of industrial hell. (Why do I get the feeling, that if it existed, Gotham City would be perhaps the most depressing large city in North America.)
The trailer also captures the mood of the film. I hope that this movie is truly great. The Batman is a very complex character, and I think is worthy of a good character study. (Ironically, Batman is one of the few superheroes that one can imagine existing -- given the determination, wealth, physical and intellectual abilities, and training of a remarkable person.)