Metallo was rendered more insane by the Joker and used his height to destroy an elevated train of commuters. As Superman and others learned on various occasions, the most effective way to neutralize Metallo was to remove his (largely invulnerable) head and isolate it from other metallic items. In Superman/Batman #2 (November 2003), Lex Luthor fabricated evidence implicating John Corben as the criminal who shot and killed Thomas Wayne and Martha Wayne instead of Joe Chill. Superman: Secret Origin In the 2009–10 miniseries Superman: Secret Origin, (which retells the origins of Superman and his supporting cast), Metallo is Sgt. John Corben and serves under Lois Lane's father, General Sam Lane. General Lane is trying to push his daughter, Lois into a relationship with Corben. Though they had one date, she does not return his feelings for her. Corben is next seen signing up for a military option to neutralize Superman (ostensibly with the help of a powersuit built by LexCorp). However, in his first encounter with Superman, a stray bullet hit the Kryptonite rock inside the suit, leading to a disastrous energy cascade within the battlesuit which almost killed Corben. Through the efforts of Lex Luthor and a crack team of scientists, Corben survived, part-man, part-machine, with the Kryptonite rock functioning as his new heart. Driven by a hatred for this alien invader, he became the villain known as Metallo. Metallo, now wearing a green, orange and red armor, subsequently attacked Superman again in a rampage which endangered not only the citizens of Metropolis, but his own fellow soldiers. He was defeated by Superman once more. The New 52 In September 2011, The New 52 rebooted DC's continuity. In this new timeline, John Corben is under the command of General Sam Lane. General Lane tells him to talk to Lois Lane, when she keeps questioning where Superman is. It is implied that Corben and Lois once had a relationship. When Superman escapes from the military's custody, Corben is seen enlisting in what appears to be a military project co-opted by Lex Luthor, General Lane, and young scientist Dr. John Henry Irons—"Project Steel Soldier"—to go against Superman. Corben is seen in the experimental Metal-Zero/"Metal 0" suit with scientists, mostly Irons, trying to help him. He continues believing that he did it for the affection of Lois and when the robotic needles are in his head, Coined "Metallo", he takes control and