I know everyone says Superman should be the leader. But I think Batman should be the leader. Sort of like a General for the army, he is the strategist and smartest one in the group. Batman physically has limited things, but he plans battle strategies and such.
It makes sense too, it was sort similar in the JL animated series.
Making Batman a leader would make batman useful, to those who says what is he doing here, he has no super powers. But I want him still to get into the action, like he did Justice League WAR.