^It all has to do with what trailers are sent with what movie. "Alvin and the Chipmunks" and "Horton Hears a Who!" will be seen with the Simpsons Movie throughout its entire run (yes, even if it's still in theaters in October), because those two came with the movie. Theaters are also sent "trailer packs", which is either three-to-four trailers from various distributors, which comes from the theater chain's corporate HQ. They usually are packaged as "PG-13 Comedy"; "Action"; "R-rated Horror", "Children's" and such. I saw the Simpsons Movie twice, the first time I got (along with Chipmunks and Horton) "Game Plan" (bad Rock flick), "Daddy Day Camp", "Stardust". This, I assumed, was the "Family" pack. No Dark Knight. The second time I got "Mr. Bean's Holiday", "Rush Hour 3", "Bourne". I assumed this was "PG-13 Comedy". Still, no Dark Knight. Why? Because Dark Knight was given to SELECT theaters. In other words, the Regal corporate that regulates our area never got the print. I think AMC got first dibs on those Dark Knight trailers. It's obvious WB wanted to get the word out, but not cause it to a point where Fox makes a gigantic amount of money on Batman fans seeing the Simpsons Movie out of intrest for the trailer. It's online, anyways...