... new DC universe, Metropolis and Gotham are sister cities. So that above shot of the city on fire could be Gotham, with Metropolis being shown on the other side of the river. I have a theory that the scene where Batman fights the troops in the desert is a dream sequence. Those soldiers all have the Superman shield on the shoulder of their uniforms; it's also shown soldiers kneeling down in front of Superman as he walks down a hallway. I think Bruce will have a dream of an all-powerful Superman, leading an army of fanatically loyal troops- and that will be the impetuous for him to go after Superman.