http://www.joystiq.com/2010/10/25/ro...-album-as-dlc/
John Lennon's Imagine album is coming to RB3 later this year. It should include every songs minus Imagine, which is on the disc. They mention in the press release that they're releasing it to celebrate what would've been his 70th birthday, so December 7 may be the release date for the album.