I also see why there haven't been any Guns songs in Rock Band. No normal human can sing like Axl Rose.
Wasn't Welcome to the Jungle downloadable in Rock Band, or did youtube lie to me again?
Anyway...
Alice Cooper - Poison
Journey - Don't Stop Believing (Seriously, I don't care who,
someone add keyboard as a playable instrument XP)
Pink Floyd - Another Brick in the Wall
Dragonforce - Fury of the Storm
Returning songs (Why not, you can't play drums or sing in the other games)
Guns n Roses - Welcome to the Jungle
Lynyrd Skynyrd - Freebird
Alice Cooper - School's Out
Deep Purple - Smoke on the Water
There's more, but I can't remember who made what, right now. XP