Batman [Bruce Wayne]; Superman [Clark Kent; Kal-El]; Robin [Dick Grayson]; Doom Patrol [Robotman [Cliff Steele]; Elasti-Girl [Rita Farr]; Negative Man [Larry Trainor]; the Chief [Niles Caulder]]; Mongul (flashback); Li Jing; the Devil Nezha; Felix Faust; The Flash [Barry Allen]; Wonder Woman [Diana of Themyscira]; Supergirl [Kara Zor-El]; Billy Batson; House of Ji [Shuǐ; Huǒ; Kōngqì; Dìqiú]
Synopsis
Batman turns to Niles Caulder to perform emergency surgery to save Superman from Red Kryptonite poisoning. After Superman recovers and they compare notes with the Doom Patrol, they learn of the threat of the Devil Nezha, who previously threatened an ancient Chinese civilization and now has returned to threaten the world.