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/Shazam: First Thunder Superman/Shazam: First Thunder Superman/Shazam: First Thunder is a 2006 comic book mini-series published by DC Comics, written by Judd Winick, with art by Joshua Middleton. The story recounts the first meeting between two DC superheroes, Superman and Captain Marvel. Contrary to the usual popular stereotype, the encounter proves most pleasant as they quickly become staunch allies whose individual differences complement each other well. Set at the beginning of what the Wizard Shazam calls "the second age of the great heroes", after the debut of the Man of Steel, Batman, and Captain Marvel, but before the coming of Wonder Woman, the