Although Warner Bros. decided not to debut anything Dark Knight related during their official panel, the studio staged an elaborate stunt outside by painting a phone number across the sky, followed by a message from the Joker. For those who'd like to play along without skipping to the end of everything, call this number: 1-800-395-9646. Follow the riddles given to you on the phone over at the website we talked about earlier today. Eventually, as you pass each step, the above photo will appear. Looks like Maggie Gyllenhaal ain't having such a swell day. And yes, that's Heath Ledger as the Joker with a knife up to Mags' sweet face.

As you move further along in the Joker's game, eventually you'll be provided with the first teaser trailer for The Dark Knight ... in glorious HD quicktime. It's taking a really long time to load the best quality trailer, but I got through pretty quickly with this link. As expected, it is the same trailer we wrote about yesterday (the one that was leaked onto YouTube) in which no actual footage is shown; just a fairly heated conversation between Bruce Wayne/Batman (Christian Bale) and Alfred (Michael Caine). The Joker's voice pops on briefly, a Joker card flies at the screen ... and we're out. Stay tuned to Cinematical as we've been all over ComicCon and will share all the glorious breaking news as it hits.