From Terminal Gamer:
"Here is a list of 10 new ideas that Harmonix should think about implementing in RB3. I'm talking new stuff here, so having songs from RB1/RB2/DLC be exportable to RB3 is a given, as is online multiplayer and some form of career mode. I also tried to think of things that haven't been mentioned before, so as much as we all want it, you won't find "LED ZEPPELIN" anywhere on this list."