6. Batmans Disinterest
If youve ever read much Justice League, or watched any of the awesome Justice League Unlimited Cartoon, youll be aware of how disinterested Batman is in the camaraderie amongst his fellow League mates. In fact, hes only ever agreed to join them part-time; meaning if they need him, they call him, if they dont, they leave him the f*ck alone. Not only is this more on-proof that Batman is, despite being just a man, absolutely solid (after all, if Superman is calling you when the going gets tough, you must be doing something right), but itd also place an extra emphasis on the threat level of whatever super powered being or force is threatening the Earth in the movie. Im not saying dont include Batman, thatd essentially be suicide for a Justice League script, Im saying have him there only because hes absolutely needed, not because he actually
wants to be there.