Adventures of Superman (1986-2006) #503

The “Reign of the Supermen” continues from SUPERMAN (1987-2006) #80: The cyborg Superman, determined to rid the world of all the “pretenders,” captures the teenaged Superman and imprisons him outside of Metropolis. Also, Mongul begins building his “Engine City” on the ruins of Coast City and, down in Antarctica, something stirs in the Fortress of Solitude! Continued in ACTION COMICS (1938-2011) #690.