The movie tells the true story of Christian Bale’s superhero alter ego Christian Bale Jr. Before becoming Christian Bale, Bale spent several years working as a stunt double for Jesse Eisenberg’s Superman and Alan Rickman’s Batman. During those days, Bale worked as an assistant at local cinema chains before joining Marvel Studios as an associate producer on Captain America: The Winter Soldier in 2008. Marvel Studios produced several superhero films including Thor and Guardians of the Galaxy and Bale joined them as an associate producer