James Gunn cast Bradley Cooper for an important 'Superman' cameo because he needed someone 'who could walk in the footsteps of Marlon Brando.'

Writer/director James Gunn called in a 'favor' to Bradley Cooper to appear in a key role in his new DCU feature.

James Gunn’s box-office hit Superman is chock-full of cameos, and there’s one particular collaboration in the film that came about via the DC Studios co-CEO’s past connection to the MCU. In the opening moments of the David Corenswet superhero vehicle,