We’re almost there — summertime. Grilling in the backyard, lounging at the pool, #roseallday. Pretty soon we won’t have a care in the world. But not Hollywood! For Tinseltown, the next three months mean that a series of frightening existential questions will be posed on a near weekly basis. This is by far the most massive movie summer — in theory, anyway — since 2019, with “Star Wars,” Spielberg, Christopher Nolan, Marvel, DC, Pixar and a Disney live-action flick all jockeying for position.