There's a particularly tasty rumor (actually, it's from overseas, so it's a rumour) floating around the internets that owners of the 360 version Guitar Hero II will be able to rock out to Halo 2's theme song. Official Xbox Magazine hints that you'll be able to download the Steve Vai tune (whose proper name is "Halo Mjolnir," by the way), but couldn't get a firm yay or nay from anyone about it.
If the rumor rumour turns out to be true, you just know that there's going to be an unlockable Spartan character axe-master. Or, better yet, unlockable Cortana. Rawk!
