Diana: Warrior Princess is an indie role-playing game written by Marcus Rowland and initially published by Heliograph Incorporated, based on an article describing the setting which originally appeared in Valkyrie magazine. It is distributed as a PDF via Steve Jackson Games. It describes a fictionalised version of the twentieth century as it might be seen a few thousand years from now.
Elvis: The Legendary Tours was one of several spin-off series mentioned in the original game; others included Parton: Lust For Glory, a military adventure series; Toni the Vampire Slayer, in which teenager Toni Blair fought the undead; Gandhi's Angels, a martial arts detective series; and Richard of Hollywood, a Robin Hood parody in which Richard Nixon battles the evil Uncle Sam. In a LiveJournal entry Rowland stated that he does not plan to write Parton: Lust For Glory; the other settings were not mentioned. Subsequent entries have included a cover design for Gandhi's Angels, and more recently several entries discussing Fanfic: The Role-Playing Game, a possible future project based on a variant of the Diana: Warrior Princess rules.