Muse were always willing to sell their songs. The popular opinion was that Activision had formed an exclusivity deal with the band, preventing their songs from being released in RB.
Now we know that isn't the case, but it doesn't really change anything. There's obviously some other reason we haven't seen Muse DLC.
- Licensing costs too high?
- Harmonix were waiting for the new instruments?
- Rock Band: Muse?
- Harmonix don't care?