The fight between Superman and Doomsday in the record-breaking, history-making Death of Superman left an impact on the comic book industry that remains to this day, but fans have always been curious as to what a rematch would look like. Few audiences know this, but these two actually did have a rematch. Albeit, it happened on an admittedly lower profile with lesser fanfare - because it's hard to have an even higher profile than what came before it when the first round ended in DC's most popular superhero dying - but nonetheless, the second round saw a real knockout.
As previously mentioned, the first round between Superman and Doomsday takes place in The Death of Superman, from Dan Jurgens and Brett Breeding. As promised by its title, the battle ends with The Man of Steel's death, but also the death of Doomsday, seeing as the two adversaries beat each other to death. It's what happens when an unstoppable force meets an immovable object.
The dilemma here is that when audiences watch two evenly matched juggernauts come face-to-face for an inevitable collision, audiences expect a winner. Think of Tyson vs. Holyfield or Freddy vs. Jason, both fights that ended in a questionable way where a winner wasn't clear. Having an ending without a clear winner forces audiences to beg the question "What If?" long after the dust has settled. Those who read The Death of Superman pondered that same question after seeing Superman and Doomsday knock each other out, but they needn't ponder any longer. Not when Dan Jurgens and Brett Breeding released Superman/Doomsday: Hunter/Prey in 1994.
In the aftermath of The Death of Superman, Doomsday's seemingly lifeless body was strapped to an asteroid and flung into the atmospheres of deep space. Surprisingly, Doomsday wasn't completely lacking in life after all, nor was space deep enough to contain him once he found his way on a scavenger ship. Coincidentally, the ship was en route to Apokolips, the home planet of Superman's other arch-rival, Darkseid. Doomsday actually fought and dominated Darkseid with ease, convincing Darkseid's servant Desaad to reluctantly call Superman for help.
This sets the stage for the unstoppable force to meet his immovable object on the planet Calaton. This time, Superman is equipped with a new suit, a Mother Box, some longer hair, and a tougher, volatile attitude hellbent on settling the score once and for all. Their second fight turns out to be just as bloody and vicious as their first encounter. The difference between the two comes from an ending that sees Superman use a time travel device to launch Doomsday to the ends of time, where he is destroyed for good by the entropy. The sequel may not have the same bells, whistles, or hype as its predecessor, but it does have a winner that confirms Superman to be the better of the two.