From the CHUD site (Cinematic Happenings Under Developement) here is an article about "Watchmen" in which Patrick Wilson plays "Dan Dreiberg/Night Owl II" (see photo above). It talks about some behind-the-scene info given by an extra. READ MORE.
The article also states:"And by the way, in case you didn't have enough reasons to see The Dark Knight... well, my excellent sources tell me you'll get to see your first glimpse of Watchmen in action in front of that film." Here's a list of the opening dates (US and internation) for "Dark Knight". First places are in mid-July. IMDB-Dark Knight.
And, there's been speculation in some circles that Zack Snyder will be presenting something about Watchmen at the San Diego Comic-Con July 24-27. Comic-Con