Raiden

The power of Raiden is grossly misrepresented in the Mortal Kombat franchise. This is because fighting games rely on balance. One character can't be significantly more powerful than the other, even if that character is a frickin' god. That would defeat the purpose of playing as any of the other characters. Thus, Raiden is doomed to slum about with the likes of Johnny Cage and Kurtis Stryker, the true limits of his power untested forever.

Outside the constraints of the typical fighting game engine, Raiden would be a force to be reckoned with. Like Thor without a hammer (though does sometimes use a staff and is sometimes seen with a scabbard, indicating some sort of sword), Raiden's mix of god-given immortality and mastery of lightening would make short work of Superman.

Raiden possesses all the talents necessary to defeat Superman, as demonstrated in the moves he wields in the games themselves, if not by the way they are portrayed for purposes of game balance. He can convert his body to energy for purposes of teleportation and transportation, generate amazing amounts of energy from his body (as well as summoning it from the heavens), and he knows kung-fu. Plus, as an immortal, he has been fighting cosmic battles against powerful entities since way before Superman shucked his first corn-husk on Pa Kent's hick farm.

The clincher is that, while he can be physically defeated, as a god his mortal shell means nothing. His godly essence will re-coalesce itself inevitably, as it did most notably after Raiden seemingly destroyed himself attempting to defeat Onaga before the events of Mortal Kombat: Deception. That attack would have totally worked against Superman by the way, being magical and all. Raiden's magical nature pretty much ensures that only a powerful sorcerer or fellow elder god has a hope of defeating him permanently.

Not that it would really come to that. Captain Marvel has kicked Superman's ass so many times with magic god-lightening that I'm surprised Superman hasn't taken to rubberizing his underpants-on-the-outside costume.

Next Week: Super-Skrull