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
Origin of Superman Planet". Not only does everyone know they had a child; they were there shortly after Jon was born. The "Daily Planet" crew has known Jon his entire life." Flashbacks seen in that story indicate that the origin as depicted in the New 52 and in "Superman: Secret Origin" have been hybridized, with most of the characters' pre-"Flashpoint" histories overwriting early New 52 stories. In the DC Comics Multiverse, there are several versions of Superman originating from different parallel Earths. Most of these counterparts have subtle differences in their origins. Alterations to Superman's origin are also frequently used as the premises