Rage.Of.Olympus
Senior Member
"When Superman and Superman 2 are in proximity to one another, crazy stuff happens - as it did for anyone who got too close to their "other." So as a combination of that fact and the amount of power the two were exerting against one another, their histories "swapped." Our Superman "grew up" in a 1950's style world and "Superman 2" grew up in our world. Ultimately, each one believed that the other's world was sick and corrupt, but discovered that they could not "fix" the other's world, and in fact made things worse.
This all happened in flashes during the battle, and in the end were "fragments of reality" not the actual history of either universe - just memories shared by the two Supermen."
Not to mention Alexander was completely wrecking the barriers that separated the Multiverse IIRC. It's been a while but I'm pretty certain that Infinite Crisis made it pretty clear to us.
Claiming they were destroying space-time is just idiotic. When Superman references space-time, he's referring to their experiences.