This preview from CHUD...
First, this is a trailer - not a teaser. It's over two minutes long and it contains footage from throughout the film. And it reveals Dr. Manhattan. Second, it's a trailer that's going to leave mainstream audiences with a lot of questions. Which is incredibly cool. The trailer isn't narrative - you wouldn't know what the (bleep) this movie is about just from watching this trailer. There's one line of dialogue in the thing, and it's Rorschach. Jackie Earle Haley's Rorschach voice sounds cool but not contrived - he's not putting on some ridiculous rasp or anything.
If there is a narrative thread in these two minutes, it's the origin of Dr. Manhattan. We see Jon Osterman stuck in that particle chamber, and then getting disassembled. Later we see his nervous system reconstructing itself in a hallway, scaring a janitor. Then we see him completely forming himself in the commissary, big, blue, naked and in a Jesus Christ pose, hovering above the floor. We see three Jons in one shot, and we see Jon and Laurie kissing in a shot that was so beautiful it gave me some goosebumps...
Get the rest from CHUD at the link below.