It would be a real shame if we never got our hands on the White Album and A Hard Day's Night albums in Rock Band.
There hasn't been any sort of announcement-- one way or the other. Maybe now (fingers crossed) future releases are a surprise?
But it's this quote, floating about on the Internet, from Harmonix PR rep John Drake that worries me most:
And unfortunately, Beatles: Rock Band sold well under industry projections."Every time we do one song, it's not like Rock Band where we wait for the masters to come in and just author them... its like, send people to Abbey Road, use the original tape, separate them out... it costs thousands of dollars. We're waiting to see how things sell. We're waiting to see how the albums do. If they sell well, we'll have a lot more content."