Paul did a disco album....I'm sure if The Beatles were still together in 1980 that Paul would have tried to convince them to do a disco album.

Some of John's stuff from the mid-70s is proto-disco: "What You Got" "Whatever Gets You Thru the Night"--chunka-chunka dance boogie machine music.

George laid down some funky grooves on "33 and 1/3."

(On the other hand, with the exception of a couple more orchestrated songs, John's POB is almost an early punk album.)  

Oh, I just thought of the title of their hypothetical disco album: "MacLennon Moves" with John and Paul on the cover with Beegees outfits, standing back to back doing the Travolta point.  

Sorry to put that image in your heads, folks.

Quoted from tkitna

I agree with this, but just for giggles, lets say they used Jim Keltner. I'd be happy with that.

That's a great point. There are alot of unsung heroes that played pivotal roles in the Beatles' lives, like Jim, the Jesse Ed Davis' of the world that could have been called in at any time. I read that when George walked out, John hardly gave a mess and said "Call Eric" (Clapton). At that point in their career, they weren't the Moptopped Fab Four anymore, they'd all sprouted by then.

If that really had happened, and whoever may have replaced George and Ringo, I think it's possible that the 1st album together would have sold well but future releases would have had drifting sales - like their solo work.