After several harrowing showdowns with the forces of evil, Superman has liberated the Earth, returning all government, military and law enforcement power to the same people who had it before, which is obviously the right thing to do, and not something that anyone will regret later on.
Of course, there are some unfortunate aftereffects. There’s all the wear and tear on Mount Rushmore, for one thing, and a bunch of repair work that needs to be done around the Daily Planet building in Metropolis. Besides that, the world is going to have to figure out how to develop a new approach to global politics and international security, so that three mean people can’t take over the entire planet by blowing up a couple of monuments.
Most significantly, Lois Lane has sustained significant character growth, which will force her to make some difficult choices. She’s been following a dream that can’t come true, and understanding that truth, while painful, will ultimately help her to break out of an unproductive pattern and find a new path forward in life. So obviously we’re going to need to put a stop to that.