Board Thread:Questions and Answers/@comment-6630833-20141127184442/@comment-3567304-20141127215508

Let's me see: Pre-Crisis: Mongul was originally the ruler of his own alien race until a revolution occurred and he was exiled into outer space. The Warworld in Mongul background was matter to one or two issues, since it was destroyed by Superman and Supergirl. Mongul was also involved in Starman (Throneworld) background. Mongul had some interesting abilities, as blast Energy Blasts from his chest and create cubes which shrink enemies neutralizing their powers.

Post-Crisis: After the 12-issue limited series Crisis on Infinite Earths, DC Comics retconned the histories of some major characters in an attempt at updating them for contemporary audiences, the original stories involving Mongul were no longer valid and the character was reintroduced as the ruler of Warworld, a space empire where Mongul entertained the citizens with gladiatorial games. Mongul captured Superman for use in the games, but the hero ended up joining forces with alien warrior called Draaga and making Mongul flee.

Then Tupka, the major motive is: The Pre-Crisis stories related to Mongul aren't valid anymore. Sadly, even the excellent story "For the Man Who Has Everything" isn't valid too. In Post-Crisis, Superman meet Mongul by the first time in Adventures of Superman Vol 1 454.