It's a bird! It's a plane! It's a… dog? Move over, Man of Steel, because Man's Best Friend is perhaps the real star of the new Superman movie. The film, directed by James Gunn and intended to launch a new cinematic universe based on DC Comics, has Superman ( David Corenswet ) facing off against Lex Luthor (Nicholas Hoult) and his posse of metahumans, but he's not doing it alone. Krypto, a little white pooch with a cute red cape, helps Superman out while occasionally doing naughty things that