But do people like McCartney for his new material or because he still plays the Beatles stuff?
I'm not saying that he shouldn't, just wondering that if he only played new material, would he be as popular? Maybe, as he's more identifiable as one of the two key forces in the Beatles (not to put Mr Harrison down, but people see Paul and John as the leading lights I think).
In the same way, people don't see Brian and Roger in the same light as Fred, and it's only those who have scratched the surface further who know/realise the contribution made by all four of them.
But if Brian and Roger did tour and record more music, and even if they did it under the Queen name, I don't think they'd get the same response as McCartney does. They'd do well, but not on the same scale.
In terms of new material, I think together they could do some good stuff, but live they're out of practice now and it would take a lot to get back into it. I downloaded some tracks from the Amsterdamn gig and Roger's vocals sounded a little dodgy. I haven't listened to 46664 recently, so can't comment on that.
I'm sure they've got it in them, but they'd have to work hard, and I don't think they want to at the moment, 'cause we all know where Brian's priorities are! So I say it's possible, but as everyone else has said, it's difficult without Fred
Oberon