No, I am not talking about the Batman: Year One animated movie.
No, not possible surprise teaser footage from The Dark Knight Rises.
I mean this:
Look for this T-shirt on the convention floor. You will have ten chances to spot it.
Supposedly, black-on-yellow is the color scheme with the greatest impact. (Fortuitously, it also recalls Batman's emblem.)
And if you must have one yourself, you can buy it from Skreened, a company with a very cool aesthetic. (Brown shag carpeting not included.)
Two versions are for sale: one with only the front text and one with both front and back text.