While nine Rock Band 2 tracks were supposedly leaked on ScoreHero forums earlier this week (taken from a screengrab of a G4TV broadcast), posts on the same forum are now revealing a further 12 tracks for the Rock Band 2 set list, apparently...

The thread (now deleted by the moderators and spotted by Kotaku), listed the following 12 tracks that are rumoured to be in Rock Band 2:

"One Step Closer" - Linkin Park "Peace Sells" - Megadeth "Testify" - Rage Against The Machine "American Woman" - The Guess Who "White Wedding" - Billy Idol "You Oughta Know" - Allanis Morrisette "Aqua Lung" - Jethro Tull "Bad Reputation" - Joan Jett "Drain You" - Nirvana "Man in the Box" - Alice In Chains "Spoonman" - Soundgarden "We Got The Beat" - the Go-Gos

Here are the other nine tracks that appeared earlier in the forums, although they were listed alongside existing Rock Band 2 DLC, so they could be unannounced DLC as opposed to being on the Rock Band 2 game itself:

"Ace of Spades" - Motorhead "Anyway You Want It" - Journey "Pinball Wizard" - The Who "Chop Suey" - System of a Down "Panic Attack" - Dream Theater or Finger Eleven "Give It Away" - Red Hot Chili Peppers "Everlong" - Foo Fighters "Kids in America" - Kim Wilde "Hello There" - Cheap Trick