Photo: Warner Bros./Everett Collection Spoilers ahead for the plot and ending of Superman. Superman is the first film in James Gunn’s rebooted DC cinematic universe, but it plays like part of an ongoing story, skipping past the hero’s famous origins and picking up three years into his time as a superhero. That means the question of who owns Krypto the superdog, a lovable terrier-mutt modeled after Gunn’s own pet dog, Ozu , isn’t addressed until near the film’s end. Referred to by the Man of