There's only six listed so far, but at least we're getting the first details regarding the songs that'll be appearing in Rock Band 4. Harmonix told IGN that the tracklist for the latest iteration of their music game will include the following:
Avenged Sevenfold - "Hail to the King"
Fleetwood Mac - "You Make Loving Fun"
Jack White - "Lazaretto"
The Killers - "Somebody Told Me"
Spin Doctors - "Little Miss Can't Be Wrong"
The Who - "The Seeker"
The current-gen rebirth of Rock Band is due to launch later this year on PlayStation 4 and Xbox One. Its chief rival is Guitar Hero, which is also set to reboot on the latest console generation, although that game will switch to live action and won't feature back-compatibility to previous DLC.