I originally had it set up to be an utterly nihilistic grunge bass and heavy guitar jam, but I figured since people are gonna be listening to it just before a game, it might be a good idea just to give energy and not have people gritting their teeth before gametime.
So a complete overhaul ensued and this was the end result. The mapload version is roughly clocked 2:40 and doesn't include, well, a lot, particularly the guitar solos toward the end.