hey just saw this over at sp.com in the user news and here is a link over to the artical, it is near the bottom where they say it, so i just am posting the pertinant info, but if you wanna read the whole artical here is the link
http://www.comicbookresources.com/?page=article&id=17402
and thanks to HypnoRaygun for the heads up
"The next question was about the Smashing Pumpkins song used in the trailer, and whether it would appear in the completed film. "Tonally, to me, it made sense," Snyder said. "Subtly, I think it also has irony, because of its lineage," the director said, referring to the fact the song was also used to promote "Batman & Robin." He said the song would not appear in the movie "because it takes place in 1985, the song had not been written yet."