There's a new bootleg TDK trailer, with lots of Joker glimpses, mostly stuff we've seen hinted at or images from before, including Joker+Ms. Dawes (aka Ledger and Gyllenhaal....) It's on YouTube, has been up a day, hasn't been pulled yet, surprisingly... I feel uncomfortable linking to it here because that might lead the powers that be to find it and have it pulled.
Anyone want to see it.. ? I can PM a link, I suppose. Be warned, it's very poor quality.
ETA: I see there are more than one version of the same. Search for "Batman 2 The Dark Knight New Trailer" at Youtube and it should pop up.