the story arc Last Son. Although Clark is quick to embrace parenthood, Lois is more reluctant, until she sees how vulnerable and sweet Chris is, and the three of them become a happy family. When Zod invades Earth, during the battle, Chris along with his birth parents are sucked into the Phantom Zone, leaving Clark and Lois without their son and heartbroken. Chris later returned as a teenager under the guise of Nightwing. In the 2009 Superman: Secret Origin, a six-part miniseries by Geoff Johns and Gary Frank that detailed Superman's new origin story (replacing Mark Waid's 2003 limited series Superman: Birthright) in the post-Infinite Crisis DC Universe. In the series, Lois becomes Clark's mentor when he begins his employment at the Daily Planet. The paper has been in financial trouble since Lex Luthor controls nearly every media outlet in Metropolis and the Daily Planet is the only major newspaper that directly attacks him. In Superman's first public appearance, he saves Lois when she falls off the LexCorp building. Understanding the flying hero's benevolence, Lois writes a positive article on him, which boosts the Daily Planets sales 700%. Eventually, Luthor becomes involved with General Sam Lane, Lois' father, so that they can defeat Superman, believing him to be an alien threat. Superman defeats Metallo, a U.S. soldier converted into a cyborg, and public opinion turns in Superman's favor. In the aftermath, Clark and Lois become friendly rivals, while Superman and Lois begin to develop mutual romantic feelings. 2011–present In 2011, DC Comics rebooted its continuity with the New 52 relaunch. In the relaunch, Lois views Clark as a friend and respects him as a journalist, but regards him as a loner who has difficulty letting people get close to him and displays no existing knowledge of his dual identity. Superman Unchained, a nine-issue series by Scott Snyder and Jim Lee explores Clark's connection with Lois in the New 52. Released in April 2015, the miniseries Convergence features a post-Crisis version of a married Superman and Lois Lane. The couple is expecting the impending birth of their child, and Superman has to protect the city after it was taken out of time by a powerful alternate version of Brainiac. Convergence shows the birth of their son, Jon Kent, Clark and Lois' biological child in DC Comics canon. Following Convergence, DC announced a spin-off comic book series Superman: Lois and Clark. The