For wrestling, music and entertainment has been a long-term cross-promotional vehicle, as a different band's song is the "official theme" of each month's PPV. For instance, for the WWE show that just happened a couple of weeks ago, "WWE Survivor Series 2005", POD's single "Lights Out" was the official music.
What's different here is that WWE original music is being used to promote other television series? What does this mean in terms of cross-promotion? What might be the advantage here for both WWE and The Shield? I'm not sure, but does anyone else have any thoughts?