"Free as a Bird" was released on 4 December 1995 as a virtualreunion of the Beatles.
Free as a Bird (Wikipedia)
What do you think? I think it would be great to play it on Rockband.
My theory for Free As a Bird is that you'll be in the dreamscape with John, Paul, George and Ringo, and then when it fades back to the studio at the end only Paul, George and Ringo are there. It's like saying, John is there in spirit even if he's not in the room.