!!For the franchise:
* TheMerch: Creator/{{Kenner}}, [[Creator/ToddMcFarlane McFarlane Toys]], and NECA all did figures based on this, ''Franchise/{{Alien}}'', and ''Franchise/{{Predator}}''. In Kenner's case, there was MisaimedMarketing going on as their figures are aimed at kids.

!!For the games
* BTeamSequel: ''VideoGame/AliensVsPredator2'' was the only ''Aliens vs. Predator'' FirstPersonShooter game developed by a studio other than Rebellion, with Fox Interactive handing the development over to Monolith Productions, a veteran First Person Shooter developer with a resume of many well-received games under their belt. The resulting game is noticeably more scripted and plot-heavy than Rebellion's entries in the franchise, and has a more stylized artstyle akin to Monolith's ''VideoGame/NoOneLivesForever'' ([[Main/NewWorkRecycledGraphics whose code base was used as a foundation to develop the game]]).
* ChannelHop: The Creator/{{Rebellion}} developed games had 3 different publishers. The Jaguar game was published by Creator/{{Atari}}. The 1999 game (and it's [[VideoGame/AliensVsPredator2 sequel]]) was published by Fox Interactive. ''VideoGame/AliensVsPredator2010'' was published by Creator/{{Sega}}.
* KeepCirculatingTheTapes: Only the original PC game and the [[VideoGame/AliensVsPredator2010 2010 remake]] are still available, with the other games either staying console exclusive on outdated hardware or are out of print.
* KillerApp: The Jaguar game was ''the'' reason to own that console when it launched, along with ''VideoGame/{{Tempest}} 2000''.
* WhatCouldHaveBeen: The UsefulNotes/ArcadeGame ''[[VideoGame/AlienVsPredatorCapcom Alien vs. Predator]]'' was believed to have been based on another film script in development. Considering that you take on an entire ''army'' of xenomorphs in the game, and one of the playable characters was a cyborg clone of Creator/ArnoldSchwarzenegger's character from the original ''Film/{{Predator}}'', this would have been a very interesting movie indeed.

!!For the 2004 movie
* ApprovalOfGod:
** Downplayed, but still notably there, in regards to Creator/JamesCameron. He hated the concept and actually ceased working on the ''Alien'' franchise due to it, but after watching the movie, he commented, "It was actually pretty good. I think of the five ''Alien'' films, I'd rate it third." Given the poor track record of ''Alien'' sequels, this could easily be considered DamnedByFaintPraise.
** Both Nimrod Antal and Creator/ShaneBlack, directors of ''Film/{{Predators}}'' and ''Film/ThePredator'' respectively, consider the ''[=AVP=]'' duology canon to the ''Predator'' series and made it so in their work. Black even planned Dutch and/or Ripley to appear at the ending of his film.
* DisownedAdaptation: Creator/RidleyScott deliberately went out of his way to de-canonize ''Alien vs. Predator'' and its sequel from the ''Alien'' series with ''Film/{{Prometheus}}'' and ''Film/AlienCovenant''.
* ExecutiveMeddling: The studio wanted a PG-13 ''Alien vs. Predator'' film (the "unrated" DVD version ended up being basically the same movie save for several seconds of minor gore restored). This decision was later blamed on notorious Fox executive Tom Rothman, who was also alleged to have demanded present-day Earth be the setting instead of out in space in the future.
* MultipleLanguagesSameVoiceActor: Raoul Bova voiced himself as Sebastian De Rosa in the Italian dubbing of the movie.
* NotScreenedForCritics: Creator/PaulWSAnderson often does this in his films, and this wasn't an exception.
* ProductionNickname: Given their names appear as such in the credits, "Grid" for the head Xenomorph and "Scar" for the lead Predator.
* PropRecycling: The budget didn't allow Amalgamated Dynamics Inc. to create new Xenomorph suits from scratch, thus many were largely refitted costumes and props already used in ''Film/AlienResurrection'', explaining why the aliens of this movie look more organic (in ''Resurrection'' it had the purpose of reflecting their cloned nature) than the biomechanical beings seen in the earlier ''Alien'' films.
* RefittedForSequel: The idea of an alien pyramid containing Xenomorph eggs was conceived by Dan O'Bannon in the original ''Film/{{Alien}}'' first draft.
* SavedFromDevelopmentHell: This was a project that had floated around for about ten years. It was only when Creator/PaulWSAnderson did his verbal pitch to the executives at Creator/TwentiethCenturyFox that anyone showed any real interest. So much so, in fact, that they greenlit the film immediately.
* TroubledProduction:
** Most of the trouble was in actually getting the project to the point where they could film anything. The initial draft was written by Peter Briggs in 1991 and set to go into production once ''Film/Alien3'' had been released, but the rights holders for the two franchises spent the next few years battling out over the direction of the screenplay, resulting in several screenwriters coming and going and various new drafts being produced, but nothing of any real substance being accomplished. Eventually the project slipped into the background, and wasn't revived until 2002, when Creator/PaulWSAnderson approached the studio about producing the film. Anderson eventually got a workable screenplay by ditching everything bar a few story elements from the original Briggs draft and writing his own story from scratch (with a healthy dose of ExecutiveMeddling, that is).
** As with ''Resurrection'', filming was pretty trouble-free, but the studio were convinced that an R-rated film would not be a box-office success and ordered Anderson to make the film PG-13 at most. There was also a spat over the writing credits, which the studio had recommended should go to Briggs and Anderson for the story, and Anderson and Shane Salerno for the screenplay, only for the Writer's Guild to inexplicably deny any form of credit to Briggs or Salerno and instead award co-story credit to ''Film/{{Alien}}'' writers Dan O'Bannon and Ronald Shusett, who had never been anywhere near the project. The end product was a box-office success, though ironically made less money than the previous year's R-rated crossover ''Film/FreddyVsJason''.
* WhatCouldHaveBeen:
** A ''very'' early script of the film would have had the film take place in the same timespace as the ''Alien'' trilogy, just like the comic books. It was reportedly due to ExecutiveMeddling that Creator/PaulWSAnderson was forced to set it in present time, which was the reason why he chose the Antarctica as a scenary in order to use the most alien-like environment possible on Earth.
** At least one early draft was also a direct adaptation of the original ''ComicBook/AliensVsPredator'' comic, featuring Ryushi and Machiko Noguchi.
** Creator/GuillermoDelToro was offered the director's chair, but opted to make ''Film/Hellboy2004'' instead. Likewise Marco Beltrami composed a score for the film that got rejected, and he went on to score Del Toro's ''Hellboy''.
** Fox wanted Creator/RolandEmmerich to direct the film back in the late 1990s, due to the box-office success of ''Film/IndependenceDay'', but Emmerich turned down the offer, choosing to work on other projects.
** Music/JerryGoldsmith and Music/AlanSilvestri were planning to team up for the film's score, but Goldsmith's battle with cancer (and eventual passing) prevented the pairing from occurring. Interestingly, it would have gone against his belief that there's no need for two composers working in the same film; usually, he only accepted an additional composer if he was pressed for time and couldn't make the deadline (as with ''Film/StarTrekTheMotionPicture'' and ''Film/AirForceOne'').
** Unlike Creator/SigourneyWeaver from ''Alien'', Creator/ArnoldSchwarzenegger was willing to work in the crossover under his character of Major Alan "Dutch" Schaeffer from ''Predator''. However, this had to be discarded when he won the recall election to California Governor, as it rendered him unavailable to shoot any films.
** The initial script called for five Predators to appear in the film (and be even more killable that they are in the final product), although the number was later reduced to three. The novelization of the film retained this plot point, though.
** Some of the script drafts toyed with the idea of Alexa getting on the spaceship and leaving ''with'' the Predators for the stars, which would have been a nod to the comic books, where her homologue of Machiko Noguchi travels with the Predators after adopting their culture.
** In earlier drafts, Miller managed to escape from the Xenomorphs but still ends up facehugger bait.
** At one stage, Creator/PeterWeller was [[http://legacy.aintitcool.com/node/16819 approached]] to appear as John Yutani, the other founder of the infamous Weyland-Yutani, who had planned to send Weyland to his death in the Antarctica and even dispatched an assassin to secure the job, but the role of Yutani was eventually erased from the script in order to keep the plot from becoming too heavy (although some claim this whole trivia was actually a hoax).
** A scene was planned but not filmed where Lex would help Scar [[BetterToDieThanBeKilled stab himself with his knife]] [[TakingYouWithMe to kill the Chestburster inside of him]] while he repeated her line "The enemy of my enemy is my friend."

* WrittenInInfirmity: Weyland is frequently heard coughing from "too much excitement" due to his condition. Creator/LanceHenriksen was fighting a genuine cold on set.
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