Superman: Whatever Happened to the Man of Tomorrow? reference to one of the nicknames of Superman as the "Man of Tomorrow", and was later again used in the title of another Superman . The comic book, "Action Comics" #1, published in April 1938 by "National Allied Publications" (later renamed DC Comics), marked the first publication of the character of Superman created by Jerry Siegel and Joe Shuster. The comic quickly became a success, and its editor soon realized that it was because of the popularity of the character. In an unprecedented move at the time, National Allied Publications introduced a second comic book, "Superman", exclusively featuring the popular
For Tomorrow (comics) an alternate universe version of the character. The "real" General Zod appears for the "first" time in the "" arc, which ran in "Action Comics" in 2006. The idea of Superman moving to a Peru jungle to construct a new Fortress of Solitude is a major story arc elaborated on prior to the events of "Identity Crisis" and "Infinite Crisis". He does not return to the Arctic Circle to rebuild the destroyed Fortress until the "One Year Later" arc "". In addition, Equus returns in "Countdown to Final Crisis" #36 (2007), in which he is trying to instigate a strike