When Luthor develops a liquid kryptonite gun, Superman replaces Batman with a new partner, Powerman.
Origin of the Superman Batman Team (Superman, Batman and Robin vs Luthor and his liquid Kryptonite gun / written by Edmond Hamilton) reprinted in World's Finest Comics #179Doctor Rocket (by Henry Boltinoff)The Frontier Census-Taker (Tomahawk / written by Dave Wood)Look Back At Bowling (full text article)The Taming of the Wild BunchThe Rocket Raiders (Green Arrow / written by Ed Herron)That Deep, Dark Secret (public service message by Buzzy / written by Jack Schiff)Notes: Liquid Kryptonite used.
— Description from Comic Vine community (comicvine.gamespot.com).
