'Superman' features a pocket universe, a tyrannical billionaire, and a flying dog. Confused? Here's the ending explained.

Superman talks to Krypto the Superdog in "Superman."

Warner Bros. Pictures

• The director James Gunn's new "Superman" movie leans hard into its comic book origins.
• The story sees Superman go up against the villainous billionaire Lex Luthor.
• It's a busy plot, so here's the ending of "Superman" explained.

The new "Superman," which reboots the DC Universe, throws audiences right into the action as the hero goes head to head with the villainous billionaire, Lex Luthor.