20 meters apart
they fight in Metropolis
the Akami is at full power from the crossover
@xlab3000: I think Menma is a non factor here.
Anyway, two things to keep in mind. How smart Superman is and how plans things out, and New 52 Superman doesn't have a problem with killing monsters if he has to. In the first issue he killed some fire demon by taking it to space and suffocating it. Heck he even slammed Batman into a brick wall and shattered it. I'm guessing the movie isn't out yet so we'll have to wait and see but if the three bozos can come up with a plan I don't see why Superman can't.