Just when we were getting sick of the Marvel Cinematic Universe … Sam Mendes comes along with the Beatles Cinematic Universe. It’s a quartet of interlocking movies about the Fab Four, each centred on one band member, and with the fascinating promise of overlaps and POV shifts, perhaps inspired by Lucas Belvaux’s triple-decker Trilogy pictures or Joao Canijo’s mirror image films Bad Living and Living Bad. Mendes’s moptop movies may tag quadrilaterally around key moments … Shea Stadium, the Maureen Cleave interview, Lennon’s death? But who to cast? Here is my fantasy lineup.