These universes and multiverses and whatever-else-verses are played out and I don't care if I never encounter another one for the rest of my movie-watching existence.

However, this newest one is a little more interesting. Director Sam Mendes has a plan to do four Beatles films, one based on each of the band members. ...

It's an interesting idea that would allow for more exploration into each of the 4 band members instead of trying to cram their stories into one movie.

It's not a bad idea, but there has already been a Beatles shared universe. It was called "reality."