Why so Serious?

"The Dark Knight kicks off with what is believed to be the Joker's new "theme." The first track, Why So Serious? scores the opening sequence, and it is mostly a loud siren noise underscored later with a pulsing beat. Nothing too original or memorable there. It definitely throws things off-kilter a bit, fitting of the Joker, but you can't help wondering if another composer could have created something much more effective. It's 9 minutes long and pretty repetitive.