Now I'm not saying they need to be best chums and agree on everthing, in fact they don't have to like each other. But why do they HAVE to fight? If we really need to demonstrate Batman's importance, have him save Superman from Kryptonite or something. Avengers did the Superhero vs superhero fight, this could help differentiate this film from the marvel brand. Hell, even Ironman and War Machine fought when the latter showed up. I hope they go the other way and have them begrudgingly agree to work together.