Songs announced for Guitar Hero III: Legends of Rock so far include:

Slash’s Original Boss Battle Recording
Welcome to The Jungle (by Guns N’ Roses)
One (by Metallica)
Paint It Black (by The Rolling Stones)
Cherub Rock (by Smashing Pumpkins)
Sabotage (by Beastie Boys)
The Metal (by Tenacious D)
My Name is Jonas (by Weezer)
Knights of Cydonia (by Muse)
Even Flow (by Pearl Jam)
Lay Down (by Priestess)
Cult of Personality (by Living Colour)
Miss Murder (by AFI)
Through Fire and Flames (by Dragonforce)
Number of the Beast (by Iron Maiden)
3's and 7's (by Queens of the Stone Age)
Suck My Kiss (by Red Hot Chili Peppers)
Raining Blood (by Slayer)
Reptillia (by The Strokes)
Paranoid (as made famous by Black Sabbath)
Cities on Flame (as made famous by Blue Oyster Cult)
Mississippi Queen (as made famous by Mountain)
La Grange (as made famous by ZZ Top)
Rock and Roll All Nite (as made famous by Kiss)
School’s Out (as made famous by Alice Cooper)
Rock You Like a Hurricane (as made famous by Scorpions)
Slow Ride (as made famous by Foghat)
Barracuda (as made famous by Heart)

Funky dory, anything with the Beastie Boys and I'm sold!