NBCUniversal chief content officer Donna Langley was there. So was Sony head Tom Rothman. Bob Iger was one of the few Hollywood heavyweights who couldn’t make it, but at least he had a good excuse, still in the midst of a vicious proxy battle with investor Nelson Peltz.

The event: The grand unveiling of Megalopolis, the self-funded epic from legendary The Godfather trilogy director Francis Ford Coppola, to the titans of the film industry. The March 28 screening — held 10 a.m. at the Universal CityWalk Imax theater — was also attended by such Coppola-verse luminaries as nephew Nicolas Cage, The Godfather series star Al Pacino and Spike Jonze, Coppola’s ex-son-in-law. Two of the film’s stars — Shia…