In what year did the film release that introduced the titular extraterrestrial race that duels with Batman in the comic book crossover "Batman Versus Predator"?
Batman Versus Predator: Batman Versus Predator is a comic book crossover featuring a duel between Batman and a member of the titular extraterrestrial race from the "Predator" film franchise. Predator (franchise): The Predator film series is a science fiction action horror film franchise based on a race of fictional extraterrestrials created by Jim Thomas and John Thomas. Predator (franchise):  Produced by 20th Century Fox, the series started in 1987 with the film "Predator", which led to two sequels and novel, comic book and video game spin-offs.
1987