Superman (comic book) story arc and began a link between "Superman", "Action Comics", and "Supergirl" that started a long-form narrative with the "" event. The majority of Robinson's run featured Mon-El and the Guardian as the featured characters, while Superman himself had gone to live on the planet New Krypton. Robinson's last full issue was #699, tying into "", and he finished his run in a short story in issue #700 (August 2010) that returned Superman to Earth. "Superman" #700 also saw writer J. Michael Straczynski, a self-professed Superman fan who feels a personal connection to the character, take over writing duties with
Superman: Secret Origin an enemy. Superman leaves anyway, and Sam orders the Army to attack. The soldiers do little to Superman, but John, in the Metallo suit, manages to weaken him by exposing him to the kryptonite. Ricocheting bullets hit the kryptonite, which explodes and injures John and allows Superman to escape. Sam and his troops arrive at the "Daily Planet", and orders it shut down until they can get definitive answers about Superman. Lex takes John into surgery and replaces his heart with a kryptonite generator, turning him into Metallo. Sam reveals to Lois, Perry, and the "Daily Planet" staff that Superman