Well, Hell froze over once (see the Eagles) and now it looks like it may need to freeze over again.
According to the Wall Street Journal, the Beatles have licensed their music to MTV games for use in
Rock Band series. Apparently the official announcement is supposed to hit tomorrow (Thurs 10/30) from Viacom MTV and Apple Corp (The Beatles own label) and should contain more details of what will be coming to Rock Band and when. If this turns out to be true as expected, then Viacom and Rock Band just fired a massive shot over Activision's bow in the battle for exclusive song rights.
-Updated- You can get
more information from this new news post by John as the game is NOT going to be coming to Rock Band but a brand new game onto itself.