Publication history of Superman written by Alan Moore with art by Curt Swan. Although the new Modern Age version of Superman is said to have already been active for many years, most previous Superman appearances and elements were rendered out of continuity by John Byrne's "The Man of Steel". Later stories such as "" bring many of the Silver Age elements back into continuity. In Byrne's version, Superman came from the planet Krypton which was re-imagined as a cold, sterile world in deep contrast to the wonderworld of the past 48 years. Once Kal-El's rocketship (containing genetic materials and a birthing-matrix which resulted in
Mongo (fictional planet) wishes to unite Mongo's five warring realms (Arboria, Ardentia, Aerie, Aquaria, and Frigia). Krang's son, Ming, eventually does so by force. In the later Dynamite "Flash Gordon" series, Mongo is the base of Ming's empire. Mongo harbours a "Valley of Portals" which contains portals which lead to the other worlds Ming rules, including Arboria and Coralia. Arlene Williamson (the first wife of Al Williamson) and Jim Keefe both drew maps of the planet Mongo, based closely on Raymond's stories. The game "Flash Gordon & the Warriors of Mongo" (see below), also featured Lin Carter's map of the planet, similar to