Burger King recently unveiled their Transformers: Revenge of the Fallen promotional site (visit it here), and Allspark member Tekcorps, after doing some hunting around, has come upon the link for the file played in the background, which is named "decepticons_theme.mp3".

Could this be the Decepticon theme from the movie score?  Get the download link for the mp3 and discuss its awesome creepiness in Tekcorps' thread.