If a Beatles: Rock Band 2 was to be released, would you get it?
Seriously consider this:
More songs that were missed by TBRB
Of course, you could import the songs from TBRB over to make it even more complete.
I'd say that it would cost around $40 or so, no new instruments or bundle pack..just the game itself. But then again, HMX will be paying a lot for the songs...maybe it would have to be $60.
I'd get it, maybe I'm crazy, but I think it's a good idea. Maybe a release date of 11/11/11? :P