It's not a super surprise Brian wasn't considered, even beyond the likely scheduling conflicts. At least some of those acts, especially McCartney and the Stones, book arenas and stadiums. Brian plays mostly indoor theaters and some outdoor amphitheaters. Same with Mike's band.
Not trying to be a d**k about it, but the *only* shot any BB-related band would have had at being considered for such a bill would have been the full reunion lineup.
Agreed. And while I'm reluctant to admit that OSD might have a point, in terms of a gig of this scale the brand might well have been too diluted by the casino, private party and county fair gigs for even the C50 line-up to have the same significance and allure as the other big hitters here.
On the bright side, it kinda means the BBs' ticket prices will never be in the same league either, so even OSD can afford to go see The Beach Boys featuring Mike and Bruce with John Stamos.