I thought I gave the proof already, but oh well. Hulk has the "potential" for limitless strength, which is nice to have, but doesn't help when you're fighting someone who's already far beyond Hulk's usual level of strength. Lifting a mountain? Please, Superman lifts those for fun. Punching an asteroid twice the size of Earth (which it shouldn't be a asteroid at that point, it should be a planet, and it would be impossible for someone Hulk's size to destroy it with one punch with the pieces destroying everything around him, but hey, he did it regardless)? Superman plays with planets like they were marbles. Also, he can blow out stars, and destroyed an entire distant solar system with a single sneeze. And you expect Hulk to be able to fight something like that, with all of Superman's other abilities added? I don't think so. And yeah Flash is fast, but he doesn't have Superman's superior strength to back it up. And, as everyone said, Pre-Crisis Superman WAS super-intelligent, if you didn't know. He learns human and alien languages in seconds, builds devices in seconds, and intellectually competes with Lex Luthor, who pretty much compared to Dr. Doom and Reed Richards back in the day. I like Hulk, but he's too one sided. Strength alone won't beat someone with strength, speed, flight, heat vision, super/freezing breath, etc. Pre-Crisis Superman's too strong, too smart, and too versatile for Hulk. I wouldn't dare put any of my favorite Marvel characters against Pre-Crisis Supes, cause I know better.