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,

"He's the Man of Steel, not the Man of Conversation," Snyder tells Gunn on the animated series. James Gunn and Zack Snyder are going head to head over Superman — though maybe not in the way fans expected.

Joining a long list of celebrity voices to have appeared on Rick and Morty, Snyder popped up to play himself. But the main guest star in “Ricker Than Fiction” is James Gunn —whose Superman hits theaters later this week,