Superman: Whatever Happened to the Man of Tomorrow? is a DC Comics trade collection of the final issues of the pre-Crisis on Infinite Earths titles Superman #423 and Action Comics #583. Written by Alan Moore, pencilled by long-time Superman artist Curt Swan, and inked by George Pérez (Superman #423) and Kurt Schaffenberger (Action #583), the tale incorporates the Mort Weisinger-era style but has a distinctly modern twist. It is intended to close the book on the original character's history prior to The Man of Steel relaunch by John Byrne.