Didn't the Beyonder say the Hulk can achieve infinite Strength and Rage. So basically Superman could do what he did to Doomsday, but the difference if the Hulk could get mad enough to break time and space to get back to the fight against Superman till he finally got mad enought to snap Superman in half, but by then you're talking about ending the universe. If it was just a fist fight with no flying and mano to mano, the Hulk would get his green butt handed to him for the majority of the fight till the hulk started catching up to Superman in strength and speed then I believe he would start to surpass him till the Hulk was cracking the Earth in half to push the Big S's face into the back of his skull.