Adventures of Superman #612

Two Supermen square off on this striking March 2003 cover — one rendered in a retro, golden-age style stands triumphant with fist raised, while a more modern Man of Steel reels backward from a chest-blast, the tagline "The Man of Yesterday vs. The Man of Tomorrow!" making the generational clash deliciously clear. Kevin Nowlan's pencils and inks give the whole scene a clean, confident dynamism against a bold yellow sunburst backdrop. Writer Joe Casey and artist Derec Aucoin's "Authorized" promises a Superman story with a genuinely clever premise at its heart.