For a movie that's meant to represent the birth of a brand-new cinematic universe (the DCU), James Gunn's slight and slaphappy take on "Superman" doesn't feel much like the start of anything.  In part,

Zack Snyder gives James Gunn some unsolicited advice about his 'Superman' movie as the two cameo on 'Rick and Morty': 'He's the Man of Steel, not the Man of Conversation.'

Rick and Morty' exec producer Scott Marder shared how James Gunn and Zack Snyder agreed to parody themselves and their dueling 'Superman' takes.