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Today, James Gunn announced that, yes - after a year of playing hide-the-ball with the issue - Superman's canine companion, Krypto, will appear in 2025's Superman.
Full disclosure - a full subset of my Super comics and paraphernalia collection is Krypto-related. My house is littered with white dogs in capes. There's like 7 of them in the room I'm in right now. I am also a grown man who spends 45% of his waking time talking to a 128 pound dog with zero manners.
If you think a Super Dog is a dumb thing and superheroes can't have pets... I would like to introduce you to DC Comics' longstanding tradition of Super-Pets and related animals. Krypto was a mid-1950's addition to the Superman canon, showing up less than twenty years after Superman first showed up in 1938. But after the insertion of Rex the Wonder-Dog into DC's world of action-adventure, sometimes in military comics. Batman has Ace the Bathound. Wonder Woman has had a variety of pals, but Jumpa, her kangaroo, is probably most famous for nerds. Robin has a Batcow. Here's an encyclopedia of them.
It's important to remember that one of the biggest stars in movies through the late 1920's was Rin-Tin-Tin, a German Shepard. Rin-Tin-Tin and Lassie enjoyed stardom in movies and television through the 1990's. Dogs as characters just wasn't a weird idea to people in media. And especially when you're trying to rope in a younger audience, as comics were intended through the 1980's.