The Unknown Superman is the Superman of the 46th Century. Kal-El disguised himself as the Unknown Superman to act as a member of the Superman Squad and travel back to his own first years as a hero.
The Unknown Superman identity was created by Grant Morrison and Frank Quitely, and first appeared in All-Star Superman #2 (2006). Several years later, his first appearance in regular continuity took place in Superman/Batman #80 (2011). However, his design predates his naming and portrayal as a distinct character, as it is derived from a disguise Superman wore in Action Comics #239 (1958).
See Also