Rock Band: Beatles?

I was browsing around, after hearing some interesting facts earlier today, that Harmonix and MTV seem to have a Beatles game in the works for Rock Band.

Frankly, I'm a little worried now. The Band-exclusive titles are kind of a downer to the whole experience of Rock Band. I personally see them as more focused on the music (Guitar Hero strayed, Aerosmith was alright, Metallica may redeem, but World Tour to RB2 ... seriously!). While the Beatles are simply one of the greatest, if not the Greatest band ever, and if a band deserves a game it's them, I can't help but worry a little.