The fate of all existence comes down to a fistfight. The credits DO say STEVE ORLANDO after all. This is a blockbuster! Every hero left on the last Earth left in the last reality left turns out against the Extinction Society. It's a final race to stave off the very destruction we've brought on ourselves. Can we be good enough, long enough? We better hope so, because the fate of our Earth might've once rested in the hands of the Crisis Command, but they just put it in ours.
