Alternative versions of Superman establish a new continuity for DC, affecting not only Superman, but all of the DC Comics characters. The versions of Superman from this time period are traditionally divided into three main periods. The first version of Superman began being published by DC Comics in 1938 appearing in "Action Comics" #1. To explain discrepancies in the aging of Superman across several decades, his earliest stories were retroactively portrayed as having taken place on an alternative world called Earth-Two. These stories take place from 1938 until the late 1950s, although the exact dividing line is unclear and some stories happened identically to
Superman/Batman Superman/Batman Superman/Batman is a monthly comic book series published by DC Comics that features the publisher's two most popular characters: Superman and Batman. "Superman/Batman" premiered in August 2003, an update of the previous series, "World's Finest Comics", in which Superman and Batman regularly joined forces. "Superman/Batman" explores the camaraderie, antagonism, and friendship between its title characters. Jeph Loeb, the series' first writer, introduced a dual-narrator technique to present the characters' often opposing viewpoints and estimations of each other, which subsequent series writers have maintained. Before the 1985 limited series "Crisis on Infinite Earths", the two iconic characters were depicted as