Golem, I love the golly green giant as much as the next guy, but even if you took away Supes' flight, Hulk would not even see Supes' attack. Again, I'm not trying to downgrade the big fella, but Hulk's strength here is not an issue. How can you attack/block what you don't see?
I never even brought in the heat vision inot the equation which at the temperature of the sun, (last I heard) would easily penetrate the Hulk's skin. Knowing how nice Supes is, he wouldn't kill the Hulk anyway, but would go for the KO. That's a very achievable scenario for Clark in a fight against the Hulk.