Karate Kid and Iron Fist vs Pre Crisis Superman

Who wins?

Hulk solos.

Val punches a hole in hulk

Hulk regenerates so fast, KK's arm gets cut off.

Val uses his severed arm as baseball bat and hit Hulk's head into another dimension

That dimension turns out to be DC Universe and Hulk's severed head eats everyone there.

pfffft Hulk is only capable of eating random civilians in metropolis until Superdouche knocks him out with his finger

Val on the other hand gives TOAA atomic wedgies while fisting Living Tribunal in the golden butt

Getting back to the match:

Val puts Superman in a muscle lock, and Danny KO's him with the magic Iron Fist.

Originally posted by StiltmanFTW
Hulk solos.

Superman, Val only using muscle lock to a mind controlled pre-crisis SuperBOY and it almost killed him in the process
Superboy defeats Karate kid when he getting serious in karate kid first appearance