Reign of the Supermen #76: Superman, Ruler of Earth

Source: Adventures of Superman #494 (1992)
Type: Alternate timelineIn Adventures of Superman #494, the entity known as Kismet cycles through a few "what if" scenarios to teach Superman a lesson about his place in the world. One of these resurrected the old chestnut about him turning all Kryptonian and fascist, throwing our nuclear arsenal into the sun and becoming ruler of Earth.

It's not all bad. Fuel-less cars, for example, and world peace. And I'm sure Superman lets the little guy live normally as he watches over us from his tower in New Kandor, forcing Lois to dress like his mother...