No it's not a Seinfeld Joke, It actually is backwards Bizarro. You'd expect Jason Alexander to walk up & say "wait a minute isn't that just basically Superman?" But the Character actually exists. He showed up in All Star Superman And is a Backwards Bizarro, Making him Relatively intelligent and if he made it to Earth would have Superman's Powers as well (I guess?)
Base Coated him Grey instead of the usual White. I Base Coat White when I want the Colors to "pop" but Zibarro has kind of a "mottled" look to him I wanted to recreate. I think it worked well.
Build Mostly Real Life Superheroes, Obscure Comic Characters (They need love too) & Wrestlers. At least I try too