Originally posted by carver9
It's called "plot". They will fight and Nul will lose. Where was it stated in the comic that Hulk can't handle Nul?
Matt Fraction:
"The root of the idea for Nul was, what if Hulk could 'Hulk' out? What if he got so angry that even he would turn into something? Nul is the Hulk's Hulk. It's this monstrous thing that's unleashed on the world because of him," Fraction explained. "One of the biggest dangling threads from the end of 'Fear Itself' is that Nul is still out there. Hulk is so mighty, so strong, that he could physically crush the hammer, and while that freed him from Nul's sway, it also freed Nul to roam the Earth. Nul is here, rampaging his way to a very specific location, destroying everything in his way, and Hulk knows that he's going to be blamed for it if Nul is not stopped. So Hulk goes to the Defenders because he believes the Defenders will help him and he believes they will be discrete about it. Nul is a chance to personify Hulk's living, walking nightmare. He's a thing more hateful, more angry and in more agony than even the Hulk is on a moment to moment basis"