| Kein Cross-Plattform-Publisher-Import, kein Disc-Import |  |
[http://www.ign.com/articles/2015/03/05/rock-band-4-announced-for-ps4-and-xbox-one]
"Crucially, your purchased songs from previous Rock Band iterations will transfer to the new generation of consoles, with a few notable exceptions. First, as your purchases are tied to your console account, Xbox One players will only be able to import Xbox 360 DLC, and PS4 players can only bring in PS3 DLC. However, there will be no import fee to bring your DLC into Rock Band 4.
Due to licensing restrictions, Rock Band 3’s on-disc music will also not be available in Rock Band 4, though Harmonix told IGN that it’s possible that a deal could be reached in the future for this to happen. Songs from The Beatles: Rock Band will also not be making the leap to Rock Band 4."