Batman: The Ultimate Evil write about Thailand, he created a fictional country named Udon Khai which had many similarities with Thailand — though Udon Khai is described as being dominated by a lone kingpin who controls the country's one-industry economy based on sex tourism while Thailand's tourism economy, which includes sex tourism, is part of an economic development strategy enabled by international development agencies. Vachss deviated from Batman canon by having the Wayne family butler, Alfred Pennyworth, reveal to Bruce Wayne that his mother, Martha, was a sociologist who was secretly investigating a child pornography ring. In Vachss' novel, the Waynes were not the
Batman: Legends of the Dark Knight popularity of these led to the limited series "". The short-lived series "Legends of the DC Universe" was based on the concept of "Batman: Legends of the Dark Knight". But instead of Batman, it featured a rotating roster of other DC superheroes. The "Batman: Mitefall" special used the modern version of Bat-Mite, who first appeared in "Legends of the Dark Knight" #38, to parody the Batman storyline. "Batman: Four of a Kind" chronicles Batman's four first meetings with the Batman villains Poison Ivy, the Riddler, the Scarecrow and the Man-Bat. Those stories were printed in the "Annual"s of the four