between online players who purchased DLC and those who did not, free compatibility packs containing additional character skins were released alongside them. On April 17, 2013, Lobo was officially revealed as the first DLC character during the Injustice Battle Arena finale. Lobo was released on May 7, 2013. On May 3, 2013, Batgirl was revealed as the second DLC character, becoming available for download on May 21, 2013. Scorpion, a recurring character from the Mortal Kombat series, was revealed as the third DLC character on June 3, 2013, and became available for download on June 11, 2013. Scorpion's appearance in Injustice featured a new costume design by comic book artist Jim Lee. The final character in the Season Pass, General Zod, was revealed on June 12, 2013, on an episode of the late-night talk show Conan. Zod was released on July 2, 2013. S.T.A.R. Labs missions for the first four DLC characters were also released as part of the Season Pass. The four DLC characters became available for Wii U owners on July 3, 2013. On June 6, 2013, Ed Boon announced that at least one additional DLC character would be created for the game due to fan demand. Boon had previously held a poll on his Twitter to determine which DC Comics characters Injustice fans would like to see added to the game. Martian Manhunter, who had been left off the polls due to having the strongest fan demand, was revealed as the fifth DLC character during a special Injustice presentation at the 2013 Evolution Championship Series despite what happened to him in the prequel comics. Martian Manhunter was released for the Xbox 360 and PlayStation 3 on July 30, 2013, bundled together with John Stewart as an alternate skin for Green Lantern. Shortly before the release, Boon revealed on Twitter that there were further plans to develop downloadable content, with the sixth DLC character being a "big fan favorite request". On August 5, 2013, the character was revealed to be Zatanna, who placed first in the Twitter poll according to Boon. She was bundled with a new skin for Superman based on Cyborg Superman, released on August 13, 2013. Mobile version Prior to the game's release, NetherRealm Studios developed a free-to-play mobile app of Injustice: Gods Among Us, which was released for iOS devices on April 3, 2013. It was ported to Android systems on November 21, 2013.