 Despite using the main theme from "The World's Greatest Super Friends", the 2010 "DC Super Friends" "The Joker's Playhouse" shares several elements of its opening sequence with "Challenge of the Super Friends", including introducing the Legion of Doom.The opening sequence of the "Robot Chicken DC Comics Special" parodies the opening of "Challenge of the Super Friends" with the Legion of Doom substituted for "Robot Chicken" original characters Chicken, Mad Scientist, Nerd, Humping Robot, Composite Santa, Gummy Bear, the Unicorn, and Bitch Puddin'.The Legion of Doom, Hall of Doom, and Hall of Justice also feature prominently in the episode.