Question: 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"?

Context articles: Superman and Batman versus Aliens and Predator
Batplane
The Resurrection of Ra's al Ghul
Batman: War Crimes
Aliens versus Predator 2
Aliens versus Predator (1999 video game)
Batman Versus Predator
Predator (franchise)
Mark Lipka
Batman: No Man's Land

Superman and Batman versus Aliens and Predator is a comic book co-published by DC Comics and Dark Horse Comics.
 It was written by Mark Schultz, with art by Ariel Olivetti.
 It is a crossover in which Superman and Batman have to battle both the Aliens and Predator.
 While both superheroes have had crossovers with the monsters individually, this was the first time they were with both at the same time.
 The two-part series was released on January 8 and then on February 14, 2007.
The Batplane, Batwing, Batjet or Batgyro is the fictional aircraft for the DC Comics superhero Batman.
 The vehicle was introduced in "Batman Versus The Vampire, I", published in "Detective Comics" #31 in 1939, a story which saw Batman travel to continental Europe.
 In this issue it was referred to as the "Batgyro", and according to Les Daniels was "apparently inspired by Igor Sikorsky's first successful helicopter flight" of the same year.
 Initially based upon either an autogyro or helicopter, with a rotor, the Batgyro featured a bat motif at the front.
 The writers gave the Batgyro the ability to be "parked" in the air by Batman, hovering in such a way as to maintain its position and allow Batman to return.
"The Resurrection of Ra's al Ghul" is the name of an eight issue comic book crossover story arc published by DC Comics in 2007 and 2008.
 It involves the return of notable Batman villain Ra's al Ghul, and is his first appearance since his apparent death in "Batman: Death and the Maidens" in 2003.
 It also connects back to the "Batman and Son" storyline, which introduced Damian as the son of Batman and Talia al Ghul.
"War Crimes" is a comic book crossover storyline published by DC Comics.
 The event ran during the month of August 2005 in the "Batman" and "Detective Comics" series, and is the sequel to another Batman crossover, "".
 While originally released by itself in trade paperback format, the later trade paperback release in 2016 would have this event as part of "Batman: War Games Vol.
 2".
Aliens versus Predator 2 is a science fiction first-person shooter video game developed by Monolith Productions and published by Sierra Entertainment for Microsoft Windows in 2001, and for Mac OS X in 2003.
 The game is a sequel to "Aliens versus Predator" (1999); both games are based on the characters of the "Alien" and "Predator" media franchises as well as the "Alien vs. Predator" crossover series.
 It is set on the fictional planet LV-1201.
Aliens versus Predator is a science fiction first-person shooter computer game developed by Rebellion Developments and published by Fox Interactive in North America for Microsoft Windows and Mac OS X computers in 1999.
 It is a part of the "Alien" and "Predator" crossover franchise, "Alien vs. Predator".
 A sequel, "Aliens versus Predator 2", was developed by Monolith Productions and released by Sierra in 2001.
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.
 It was written by Dave Gibbons with art by Andy and Adam Kubert, and was published by DC Comics and Dark Horse Comics in 1991.
 Adam Kubert won an Eisner Award in 1992 for his contribution.
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.
 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.
 Related to the franchise is the "Alien vs. Predator", which combine the titular Predator with the creatures from the "Alien" film series.
Mark Lipka is a comic book artist who has inked such comics as Batman, Star Wars, Justice League of America, Wolverine, Gambit & Bishop, Green Lantern, Swamp Thing, Aliens versus Predator, Daredevil, among others.
"Batman: No Man’s Land" is an American comic book crossover storyline that ran for almost all of 1999 through the "Batman" comic book titles published by DC Comics.
 The story architecture for "No Man's Land" and the outline of all the Batman continuity titles for 1999 were written by cartoonist Jordan B. Gorfinkel.