It's already been done in the Comic Book World where Marvel and DC Comics decided to make this unlikely but popular fight take place. Fans then way back in the early 1980s figured that this was a joke but piled in anyway to read the comic. Basically in the storyline the Joker cons the Hulk into a fight with the Dark Knight. Batman uses a bit of ingenuity to outwit the giant green monster and that's the only way Batman could beat him. However, the comic book could have taken other strategies into consideration.