Takes place on the rainbow bridge, no outside interference, KO wins
Kalibak is strong as his half brother Orion. He nearly throttled Superboy and he's taken it to the Supermen of America. He's also soundly defeated Lightray. Heimdall may have the skill advantage,
He's a 50 tonner. So Kalibak's strength is double.
Okay. That's still quite a difference assuming Kalibak is anything at all like Ulik, which I don't think is a stretch.
No, it's not, that would actually be a good fight to see. p.s. apologies, I meant Kalibak, accidentally wrote Ulik lol