One of the biggest events at this year's New York Comic Con was the bowing of the new trailer for The Dark Knight. Reaction to the clip was apparently cacophonous to say the least (oh, we know, who'd have thought?) and there was word that the trailer will be seen by the general public when Iron Man opens.
If you can't wait until then, you can read a description of the trailer at JoBlo here and make up the pictures in your head, or use finger puppets, if you have some to hand.