Murdermek, a death droid weapon, is sent back to Metropolis during Superman's time. OMAC, the one-man army corps, travels back to that time, too, to help Superman in "The Once and Future War."
Mark Waid, Geoff Johns, John Broome, Gardner Fox, Len Wein, Cary Bates, Bob Kanigher, Marv Wolfman, Francis Manapul, Brian Buccellato, William Messner-Loebs, Scott Kolins, Mike Wieringo, Alberto Dose, Ethan Van Sciver, Carmine Infantino, Ross Andru, Irv Novick, Andy Kubert, Harry Lampert, Everett Hibbard, Mike Collins & George Pérez
Alan Brennert, Len Wein, Mike W. Barr, Walter Gibson, Paul Levitz, Cary Bates, Dick Giordano, Carmine Infantino, Joe Kubert, José Luis García-López, Walt Simonson & Tom Yeates
