History TrailersAlwaysSpoil / LiveActionFilms

** Several trailers for the film a few weeks before release revealed that ComicBook/ScarletWitch and ComicBook/{{Quicksilver}} would turn on ComicBook/{{Ultron}} and join The Avengers. While long-term fans of the comic know that the pair were/are members of the group, they still spoiled a nice twist for those that didn't. The final theatrical poster also spoiled this by showing the two fighting alongside the Avengers, despite the previous trailer showing them fighting ''against'' the heroes.

* A minor controversy arouse after a TV spot for ''Film/CaptainAmericaTheWinterSoldier'' seemingly spoiled [[spoiler:the death of ComicBook/NickFury]]. Even more erroneously, the fact that there were still several scenes with [[spoiler:Fury in the trailer that hadn't appeared yet by the time his "death" came up spoiled that he actually survived]].
** The trailers and TV spots also have several prominent shots of the Winter Soldier unmasked, showing that he's [[spoiler:ComicBook/BuckyBarnes]]. This is hardly a revelation to comic fans, but came as a surprise to audience members who hadn't read the source material.

** A Japanese trailer pretty much gave away the whole [[spoiler:subplot about ComicBook/{{Hawkeye}} being HappilyMarried]], which was originally one of the most confidential parts of the movie before its world premiere. One of the Japanese posters even features [[spoiler:Hawkeye embracing his children.]]
** Ahead of the film's release, it was revealed that the movie would feature a "big death" in the final battle. Some astute fans noticed that there was a serious lack of merchandise for [[spoiler:Quicksilver]], and claimed this was evidence that he would be the one to die. [[IKnewIt They were correct.]]

** The first trailer, which debuted in late November of 2017, prominently featured [[spoiler:Thor and T'Challa, spoiling the fact that they both make it through their respective films (''Film/ThorRagnarok'' and ''Film/BlackPanther2018'') alive.]] As a result, when [[spoiler:T'Challa is seemingly killed]] in the latter film, he's NotQuiteDead. Then, in a very, ''very'' questionable move on Disney's part, both films' theatrical runs showed a trailer for ''Infinity War'' before the feature.
** While the filmmakers attempted to throw off audiences by digitally changing certain shots (namely, how many stones were on Thanos' gauntlet to keep viewers from guessing what point in the film the scenes were from), the marketing also heavily featured a shot of Peter Parker lying on the ground on Titan, telling Tony that "I'm sorry", and a later shot showing Tony appearing to be mourning on the planet. [[spoiler:The shots are from the disintegration scene, where Tony watches Peter turn to ash in his arms]].

** By necessity, the trailers and TV spots for the film spoil that [[spoiler:half of the universe has died, showing several prominent character deaths in flashback (including Falcon, Scarlet Witch and Bucky Barnes). It also strongly implies that Hawkeye's daughter is dead, cutting from a flashback of him spending time with her at their family farm to a shot of him turning to face Natasha, looking distraught.]]
** The trailers also spoil the ending of ''Film/AntManAndTheWasp'', [[spoiler:showing that Scott Lang was stranded in the Quantum Realm for an unknown amount of time and was presumed dead by the rest of the team, before escaping and learning what happened to the rest of Earth before reuniting with them.]]

* Creator/TomHolland himself recorded a warning not to watch the second trailer for ''Film/SpiderManFarFromHome'' if you haven't managed to watch ''Film/AvengersEndgame'' yet because it prominently references [[spoiler:Tony Stark's HeroicSacrifice]], an event which not only ends the climactic battle but directly leads into the epilogue.

* ''Film/BatmanVSupermanDawnOfJustice''[='=]s second trailer reveals that [[spoiler:Batman and Superman eventually put aside their differences and team up with Wonder Woman to fight Doomsday]]. This example was so prominent that it was featured in a Website/{{Cracked}} article that touched on trailers that spoil key plot points. The article used an old interview from a trailer editor who mentioned that this technique is used to impress investors and help move merchandise. Basically, WB spoiled [[spoiler:Wonder Woman]] and [[spoiler:Doomsday]]'s roles in the final battle to [[MerchandiseDriven drive action figure sales]]. A Brazilian Website/TheOnion-like site even ran [[http://www.sensacionalista.com.br/2015/12/03/cinemas-darao-desconto-de-50-em-batman-vs-superman-para-quem-viu-o-ultimo-trailer/ an article]] named "Theaters will give 50% discount on ''Batman v. Superman'' for those who've seen the latest trailer".
* The home media ads for ''Film/Shazam2019'' show [[spoiler:Billy's foster siblings in their superhero forms]].
* In ''Film/{{Black Adam|2022}}'', the film hints that the titular anti-hero was a young boy who defied his king and was rewarded with the powers of SHAZAM, [[spoiler: before being revealed as a RedHerring when he's killed after bestowing his powers onto his father, the true Black Adam]]. The trailers all reveal that Black Adam was already an adult with a wife and son when he was empowered. [[spoiler:This did however get the audience off-guard when they saw his son become a superhero, as there was no hint in the trailers that he would play a greater role than "dead relative"]].
* The presence of [[spoiler:Wonder Woman]] in ''Film/ShazamFuryOfTheGods'' was spoiled in a promotional video, which came after it became clear the film was tracking very low at the box office. Creator/DavidFSandberg had [[ExecutiveMeddling no control over the decision]] and urged people not to watch said video on social media.

* The trailer for ''Film/TheAdventuresOfPlutoNash'' hits a perfect combination of NeverTrustATrailer and TrailersAlwaysSpoil: not only does it try to sell the movie as reaching Franchise/ThePinkPanther-esque levels of ridiculousness[[note]]it would be better described as a science-fiction action movie with comedic moments than as a comedy[[/note]], one of the moments included in their gag reel is [[spoiler:the dramatic reveal that Rex Crater is a clone of Pluto Nash]] -- i.e. ''TheClimax of the entire movie''.
* The trailer for ''Film/{{Affliction}}'' is a very serious example: it shows the ending of the movie, [[spoiler:where Nick Nolte's character kills his father and then burns the body]].
* The poster for ''Film/{{Airheads}}'' reveals that [[spoiler:Chazz, Rex, and Pip are ultimately arrested and sent to prison]].
* [[https://www.youtube.com/watch?v=ksnwIUyspps This trailer]] for the 1999 ''Literature/AnimalFarm'' film may be more respectful to the film than [[NeverTrustATrailer the rest of the promotion]], but it also spoiled [[spoiler:the corruption of the pigs by the end of the movie]].

* The trailer for ''Film/{{Aliens}}'' spoils the existence of the Alien Queen, who originally wouldn't be shown until TheReveal to Ripley and Newt during the final sequence in the hive (and in the Director's Cut, would have been [[{{Foreshadowing}} hinted at earlier on]]). The trailer also has a pair of long xenomorph legs descending down a landing ramp, with Ripley looking on as the creature moves out in front of her. [[spoiler:This takes place during the final confrontation between Ripley and the Queen onboard the ''Sulaco]].
* ''The Alpinist'' is a documentary about the mountain climber Marc-André Leclerc. [[spoiler:The film doesn't hide how dangerous climbing can be, but Leclerc's death happens without foreshadowing. The trailer, on the other hand, is about 50% people saying how dangerous climbing can be, and has a radio news report saying that a climber has gone missing]].

* ''Film/{{Avatar}}'': A major part of the first two-thirds of the film focuses on characters wondering if they can stop the military from attacking the Na'vi. The trailer shows [[spoiler:lots and lots and lots of gunfire and [[GunPorn huge robots with rockets]], not to mention the Home Tree being destroyed]]. Is Cameron doing this deliberately?

* Before ''Film/BlackSwan'' won an Oscar, the trailers and TV spots for the film showed [[spoiler:Nina's disturbing swan morph]], which happens at the end of the film.
* ''Film/Bloodshot2020'''s theatrical trailer spoils TheReveal -- [[spoiler:Ray Garrison (Creator/VinDiesel) is being manipulated by his employer, Dr. Emil Harting (Creator/GuyPearce) to eliminate targets using manipulated memories]], a development that occurs nearly halfway through the film. And if that wasn't enough, the trailer also spoils that [[spoiler:Ray fights one of his fellow soldiers, and has a confrontation with an individual wielding a grenade launcher who has a mechanical hand that looks just like Harting's!]]
* ''Film/{{Bloodthirsty}}'': The trailer outright states it's a [[spoiler: werewolf movie, explicitly shows Grey's transformation, and even has a howl heard at the end]]. This is in spite of Grey's [[spoiler: lycanthropy]] meaning to be a big reveal on why she has her visions and cravings in the first place.
* The theatrical trailer for ''Film/TheBlueLagoon'' (aside from coming across as a mini-National Geographic documentary) spoils most of the key reveals in the film, including [[spoiler:Richard and Emmeline finding Paddy's corpse, the two maturing and falling in love, Em being injured and Richard taking her to the statue, Richard witnessing the tribe sacrificing their own members and fleeing, building a raft, and Em giving birth to a child]].
* Several trailers for ''Film/TheBoatThatRocked'' (''Pirate Radio'' in the U.S.) showed [[spoiler:the [=DJs=] choosing to ignore the new laws passed to ban pirate radio, and the boat flooding]].
* The unusual and lyrical trailer for ''Film/TheBrownBunny'' basically summarizes the whole film: On one side of the screen is Vincent Gallo's character's POV as he drives across the country, while the other side of the screen shows Chloe Sevigny's character at a party, passing out and [[spoiler:being loaded onto an ambulance, ultimately spoiling the fact that she died before the movie started and Gallo is in mourning]].

* TheStinger in the trailer for ''Film/CabinInTheWoods'' shows [[spoiler:the elevator into the Facility]], which is supposed to be the third act twist. For context, even the back cover of the DVD release only describes the plot as "bad things happening".

* The trailer for ''Film/CharliesAngelsFullThrottle'' revealed the identity of the BigBad ([[spoiler:Madison Lee]]) despite its being set up as a big surprise in the film itself. As if that's not bad enough, in pre-release promotional interviews and press pieces, everyone involved was frank and forthcoming with the BigBad's identity.

* The original ''Theatre/TheChildrensHour'' trailer effectively spoils the entire twist of the story and [[spoiler:Martha's suicide]].
* The second trailer for ''Film/{{Cinderella 2015}}'' reveals that [[spoiler:Lady Tremaine finds and breaks the slipper still with Ella before she can use it to prove who she is]].
* [[https://m.youtube.com/watch?v=o9ri5DYLvkU The Book to Screen featurette]] of ''Film/CliffordTheBigRedDog'' shows [[spoiler: the drawing from the end of the film where it is revealed Uncle Casey got a job.]]
* [[https://www.youtube.com/watch?v=gQLZlIoNI8c One trailer]] for ''Film/{{Cocoon}}'' explicitly revealed that Walter, Kitty, et al [[spoiler:are aliens]].

* ''Film/CollateralBeauty'' has a very odd subversion of this phenomenon. The trailers seemingly spoil that the main character, Howard, is visited by the concepts of Death, Love and Time, who are trying to help him get past the death of his child from cancer. This is seemingly a ruse, as the actual premise in the film itself is that Howard's co-workers hire a trio of actors to pose as Death, Love and Time in order to prove that the former isn't in his right mind. [[spoiler:Then the ending of the film shows that the "actors" really ''are'' Death, Love and Time -- except they've been helping Howard's co-workers just as much as him]].

* One of the cinematic trailers for ''Film/CowboysAndAliens'' reveals that Olivia Wilde's character [[spoiler:is an alien]]. Trailers also showed [[spoiler:her stepping naked out of the fire]], so when you watch the movie, you know that [[spoiler:she can't really be dead because that scene hasn't happened yet]].

* The trailer and several posters for ''Film/TheDarkestMinds'' show Ruby's body disintegrating at several points, [[spoiler:which in the movie is a visual representation of Ruby erasing herself from a person's memory]]. This is made worse in that the trailer specifically shows a shot of this happening in front of [[spoiler:Liam]], which is one of the very last scenes of the film.

** ''Film/TheDarkKnight'''s trailers featured [[spoiler:a few scenes involving Gordon (the Joker interrogation, smashing the Batsignal) that took place after his apparent death, tipping viewers off that he wasn't really dead]].

* Watch the trailer for the hip, black version of ''Film/DeathAtAFuneral'' and you don't need to bother seeing ''either'' movie because it shows [[spoiler:the boyfriend accidentally getting high then getting naked, the elderly uncle's bathroom problems, and the two brothers (who are also rivals) learning their father was having a homosexual affair -- with the same actor as the original!]]

* The ''Film/DieHard2'' trailer showed John [=McClane=] fighting [[spoiler:Major Grant at the end, revealing his FaceHeelTurn as TheMole near the end of the film]].
* [[https://www.youtube.com/watch?v=luSqcSVGknU This trailer]] for ''Film/DOADeadOrAlive'' is notable for including the ''very last scene in the movie''. Now, it's a short gag scene, but it does reveal that [[spoiler:Kasumi and Ayane end up on the same side despite Ayane spending most of the movie trying to kill Kasumi]].

* The trailers for ''Film/DreamHouse'' included the revelation that the protagonist [[spoiler:is actually a recently-released mental patient accused of killing his own family -- the very person he'd been searching for information on, since he believed his family was still alive and the murders had happened to the previous occupants of his house.]] While this is admittedly not the final [[TheReveal important reveal]], and happens about halfway through the movie, it is by FAR the film's biggest twist, and having it spoiled in advance makes the first half of the film hopelessly boring.

* The trailer for ''Film/EndersGame'' features a shot of [[spoiler:the bugger homeworld being destroyed]], through people unfamiliar with the book might not realize the context. This would happen to be ''the absolute climax moment for the film.'' Also, the casting of Creator/BenKingsley couldn't really help but reveal that [[spoiler:Mazer Rackham is still alive]].

* The trailers for ''Film/{{Eraser}}'' give away [[spoiler:that James Caan's character is the villain]].
* A trailer aired during the MTV Music Awards in 1996 for ''Film/EscapeFromLA'' shows a shot where Commander Malloy (Creator/StaceyKeach) walks up to Snake (Creator/KurtRussell) and attempts to hit him with a rifle in front of a burning object, which [[TheReveal reveals]] that Snake is a hologram. [[spoiler:This is the big twist during the ending, and occurs during the second-to-last scene in the film]].

** One U.S. TV spot spoils [[spoiler:Ava turning on the two human characters,]] which is fairly shocking if you don't know it's coming.
** Also, one U.S. trailer shows Kyoko [[spoiler:peeling back her face (another shows her robotic arms breaking as she's battering a wall), thus spoiling TheReveal that she's an gynoid.]]

* {{Creator/Nickelodeon}} began releasing trailers for ''Film/AFairlyOddMovieGrowUpTimmyTurner'' over a month before the movie aired. One of the earliest trailers showed a clip of [[spoiler:Tootie talking to Cosmo, Wanda, and Poof after Timmy introduces them to her]], which takes place late in the film.
* ''Film/TheFall'' starts out as a cute story about a couple of patients in a hospital narrating and imagining a fantastical epic. It slowly sinks into a darker tone when you realize that one of the main characters is suicidal, eventually becoming very dark indeed. The trailer showed the main character [[spoiler:attempting suicide]], explained outright that he had [[spoiler:made up the story to get his friend to steal morphine for him]], and showed [[spoiler:the death of nearly every main character]].
* The trailers for ''Film/FantasticFourRiseOfTheSilverSurfer'' [[spoiler:reveal the plot point that the team exchanges powers, and shows the climax, where they combine all their powers into Human Torch]].

* The ''Franchise/FinalDestination'' series is really bad about this. The trailers or pre-release clips spoil [[spoiler:[[EyeScream Evan's death]], Tim's Death, [[YourHeadASplode Nadia's Death]], [[EyeScream Samantha's death]], Andy's Death, [[AssholeVictim Hunt]] dying in a pool, George's Death, [[StuffBlowingUp The Theater Explosion]], Lori's "death" by Escalator, [[YourHeadASplode Isaac's Death]] (Hard to catch, but it IS in one of the TV Spots), [[DisneyVillainDeath Olivia's Death]], Dennis's Death, and [[TwistEnding the ending twist of Final Destination 5]]. Throw in pre-release pictures and you can count Candice's and [[ImpaledWithExtremePrejudice Peter's]] deaths too!]]
* The trailer for ''Film/FirstDaughter'' spoils the true identity of [[spoiler:the boyfriend]], a surprise twist revealed very late in the movie.
* The trailer for ''Film/FloatLikeAButterfly'' spoils the ending, where Frances [[spoiler:wins her fight against Eamann]].
* One ad for ''Film/{{Focus}}'' blatantly spells out that [[spoiler:Margot Robbie's character was just playing Will Smith's character for a fool]]. This turns out to be a subversion, as [[spoiler:Jess has a HeelFaceTurn and realizes she loves the main character by the end of the film]].
* The trailer for the Creator/NatalieDormer flick ''Film/{{The Forest|2016}}'' showed the ending of the movie, where [[spoiler:Sara is pulled under the forest floor and killed]].

** The trailers for the original ''Film/FridayThe13th1980'' and its [[Film/FridayThe13thPart2 first sequel]] showed enough of ''every'' death scene in the movie to know who was going to die before ever seeing the film. Also a case of NeverTrustATrailer, as both trailers implied that there were thirteen deaths in each movie, when in fact [[spoiler:there were only ten in each (if you count the killer in the first one)]].

* At least one trailer for ''Film/FromDuskTillDawn'' makes explicitly clear that the inhabitants of the bar are [[spoiler:vampires]], which is a twist halfway through the movie.
* The trailer for Creator/JuddApatow's ''Film/FunnyPeople'' shows that Creator/AdamSandler's character has a life-threatening disease. That's part of the premise that's been widely-known. [[spoiler:Then it goes and says outright that he may have beaten the damn thing.]] This happens two-thirds into the film. Yep.

* The trailer for ''Film/TheGallows'' spoils [[spoiler:Cassidy]]'s death. While she was a minor character (and an arguably [[FlatCharacter flat one at that]]), it is played out the exact same way in the movie.

** A [[https://twitter.com/gbafterlife/status/1447568930772602894?s=21 trailer]] for the film spoils a major reveal that the cast and crew took pains to keep secret even during early screenings -- [[spoiler:a character (suggested to be Egon Spengler) is shown crashing a truck in a field, along with hunting and trapping a ghost in Summerville, prior to the events of the story]]. It also shows a shot of [[spoiler:Callie (played by Carrie Coon) dressed in an outfit that looks suspiciously like that of Dana Barrett [a.k.a. the Gatekeeper] from the original film (a notion that bears itself out, as she's briefly possessed by a Terror-Dog), as well as four distinct proton beams being shot at something as the teenage characters look on in awe (part of the second-act reveal of Egon's defenses in the Shandor Mine)]]. Notably, this trailer leaked several weeks prior to the film's release, and resulted in fans encouraging people ''not'' to watch it, citing this trope.
** The "final" trailer goes one step further and spoils the biggest reveal of the third act -- that '''the original Ghostbusters''' (Ray, Peter and Winston) get involved in the plot, with a body shot of three proton wands being aimed at the camera, with Peter saying, "Have you missed us?" As a result, the comparable sequence in the film proper (where [[spoiler:Callie and the other kids are unable to fend off Gozer, prompting the surprise arrival of the original team -- which occurs in the ''last ten minutes'' of the film]]) to be slightly less impactful if you've already seen the trailer.

* A commercial for ''Literature/TheGirlOnTheTrain'' reveals that the perfect couple the protagonist spies on every day and is obsessed with is actually [[spoiler:her ex-husband and his babysitter/lover]].

* The ''Film/GlengarryGlenRoss'' trailer features Williamson [[spoiler:accusing Shelley of robbing the office.]]
* The original theatrical trailer for ''Film/TheGodfather'' features stills from the movie, including almost every single murder (such as [[spoiler:Sonny's]], which is meant to be a huge shock in the film).
* The trailer for the film adaptation of ''Literature/GoneGirl'' uses this trope nicely. The scenes shown in the trailer and the general theme of the trailer all point towards [[spoiler:Nick being guilty and explicitly show Amy's dead body. The twist is that not only is she not dead and Nick isn't guilty, but that he's actually being framed by Amy for her murder, and completely turns the film on its head]].

* The DVD trailer for ''Film/TheHangover'' spoils almost every significant plot event, including [[spoiler:Ed Helms' character marrying a hooker, that the group is attacked by an Asian gang, the poker scene, and the fact that there are two Dougs in the film.]]

* Both the trailer and the description on the back of ''Film/HappyAccidents'' give away that [[spoiler: Sam may or may not be from the future and he is trying to save Ruby from dying]].

** The trailer for ''Film/HarryPotterAndTheDeathlyHallowsPart1'': [[spoiler: Harry and Voldemort fight! Ollivander isn't dead! Hogwarts erupts into battle! Ron uses the sword! There's a dragon! Griphook comes back! Harry hands himself over to Voldemort!]] The worst part about all of it is that most of this stuff is from what has to be the ''second part''. So not only are they spoiling a good section of the book, they're spoiling a good section of the ''second movie''.
** If you thought that was bad, just wait until you see the theatrical trailer for ''[[Film/HarryPotterAndTheDeathlyHallowsPart2 Part 2]]''. It shows two of the most important parts of the battle of Hogwarts. [[spoiler: The first, though only a flash, is Ron visibly cradling Fred's dead body. The second is Lupin and Tonks holding hands before what is most likely their death, and the third is Molly and Bellatrix fighting.]] Might as well spoil the fact that [[spoiler: Snape loved Lily]]. The trailers also show a scene where Harry speaks to dead friends and loved ones, like his parents -- as well as a certain character ([[spoiler:Prof. Remus Lupin]]) who was still alive last time we checked. And said character is quite prominent, meaning it's hard to miss. Whoops.
** A lot of the scenes from said trailer show Harry [[spoiler:after his death and resurrection, removing the dramatic tension leading up to his death]].

* Bizarrely subverted in that the DVD cover of ''Film/HeLovesMeHeLovesMeNot'' looks [[RomanticComedy good enough at first glance]], but on closer inspection [[spoiler:all the review quotes seem to be describing a PsychologicalThriller]], mirroring the plot of the film.

* The trailers for ''Film/Hellboy2019'' show off bits from the [[spoiler:Six-Months Later pre-credits scene]].

* The trailer for ''Film/HotFuzz'' focuses almost entirely on the two main characters fighting against the entire population of a surprisingly well armed rural community, despite the fact that not only does this not happen until two thirds through the movie, but [[spoiler:it reveals that Danny does a HeelFaceTurn, before he is ever revealed to be on the same side as the townsfolk]].

** Depending on which trailer you saw, one of them shows [[spoiler:Lou aboard the huge yacht he bought himself after inventing Lougle, therefore spoiling the fact that he stays in the past]].
** Another trailer showed Jacob [[spoiler:seeing his mother in 1986, and then shows her in bed with Lou saying "I feel pregnant"]].
* The trailer for 2013's ''Film/TheHundredYearOldManWhoClimbedOutTheWindowAndDisappeared'' casually spoils [[spoiler:the scene where the main bad guy dies near the end of the movie.]]

** The trailer for ''Film/TheHungerGamesCatchingFire'' spoils that [[spoiler: Katniss will have to participate again in the Hunger Games]]. The movie itself does not foreshadow this, as she is pushed in the role of victor and mentor.
** One trailer for ''Film/TheHungerGamesMockingjayPart2'' consists largely of an emotional montage of [[spoiler:Katniss and Prim]]. It's not too hard to guess what that means, even if you haven't read [[Literature/TheHungerGames the book]].

* The advertisings for TheFilmOfTheBook of ''Literature/InhabitedIsland'' by the Creator/StrugatskyBrothers spoils ''every'' major plot point. One trailer even reveals that [[spoiler: TheHero and the BigBad turns out to be on the same side]], what was supposed to be a TwistEnding.
* One of the trailers for ''Film/IntoTheWoods'' seems to give away the fact that Cinderella's Prince [[spoiler:isn't as loving and sincere as he's letting on (and that he cheated on her)]]. Look closely at the scene where the Baker's Wife is getting kissed by someone: [[spoiler:it's the Prince]]. For anyone who's actually seen the play, this wouldn't be too much of a surprise.
* ''Film/TheIsland'' built up suspense in the beginning that was impacted by revealing in the trailer [[spoiler: that the people shown were clones and showing the escape into the real world, which all was part of the midway twist, along with figuring out what the island was]].
* The trailer for ''Film/ItsAMadMadMadMadWorld'' gives away that [[spoiler:the money is lost to the crowd watching them fight over it]].

** The trailer for ''Film/GoldenEye'' revealed the plot twist that Bond's [[spoiler: old partner Alec Trevelyan (006) was the film's main villain]].

** Averted by ''Film/LiveAndLetDie'' and ''Film/TheWorldIsNotEnough'', the two twistiest Bond films. [[spoiler: The trailers for the former conceal the fact that Mr. Big and Dr. Kananga are one and the same, and the trailers for the latter hide the fact that Elektra was the true mastermind behind Renard's schemes, deciding to work with him (and falling in love with him along the way) to ruin her father after Renard kidnapped her.]]
* ''{{Film/Juliana}}'': One of the last scenes of the [[https://www.youtube.com/watch?v=tQW2qRCrCbY trailer]] shows that Cobra discovers her secret and tells everyone, including their employer Don Pedro, that "Julián" is in truth a girl called Juliana.

** The [[spoiler:ACU members' deaths]] were spoiled in early trailers for ''Film/JurassicWorld''. Starting with the Super Bowl spot, the trailers and TV ads have also frequently depicted [[spoiler:Zara getting lifted up by a ''Pteranodon'']]. A more complex example is present with [[spoiler:Simon Masrani's death]]. The second full trailer shows a helicopter crashing through the Aviary and exploding on the ground, which doesn't reveal much by itself. [[spoiler:But anyone who later goes to the movie and sees Masrani flying his own chopper both to reach the island and to help hunt down the ''Indominus rex'' will probably fill in the dots and conclude that he goes down in the crash]]. Leading up to the movie's second weekend in theaters, Universal released a TV spot showing, among other things, [[spoiler:the BigEntrance of the ''Tyrannosaurus rex'']].

* ''Film/KaamelottPremierVolet'': The trailer showed [[spoiler:the Burgundians destroying Kaamelott with their SiegeEngines]], something that happens only near the end of the movie.
* ''Film/KeepingUpWithTheJoneses'': Yes, the glamorous, mysterious Joneses [[spoiler: are spies]]. Yes they are (apparently) [[spoiler: good guys (in as much they don't just kill the everydude couple once their cover's blown)]]. Yes, the dumpy everydude couple who are so suspicious of them [[spoiler: get involved in their operation]]. Yes, of course said couple [[spoiler: gets gussied up to go on a mission in the Jonses' place]]. And all of this is casually dropped in the very first trailer.

* The trailer for ''Literature/TheKiteRunner'' bizarrely chooses to focus on the last third of the movie and reveals that [[spoiler:Hassan dies]] and makes it seem like the whole movie is about [[spoiler:Amir trying to save Hassan's son]], even though most of the movie is about their childhood friendship.

* The trailer for ''Film/LittleShopOfHorrors'' gave away TheReveal that [[spoiler:the plant is an alien.]]
* Anyone who's seen the trailer for ''Film/TheLoneRanger'' knows the climax [[spoiler: involves the Ranger and Tonto fighting the antagonists on board a moving train.]]

** In the book, Aragorn, Gimli and Legolas were surprised to find out that [[spoiler: Gandalf had returned from the dead]], and when they heard about a "White Wizard", and at first when they finally came across him, they thought [[spoiler: it was Saruman, not Gandalf]]. In the movie, to maintain this, Peter Jackson actually went so far as to have [[spoiler: Gandalf the White]] speak with the voices of [[spoiler: ''both Lee and [=McKellen=]'']] imitating each other's voice, with their voices overlaid on top of each other. You can hear the transitions quite well, and for a moment [[spoiler: Gandalf]] sounds like he's talking with the VoiceOfTheLegion because of this.
** Well, it might have been somewhat hard to keep the revelation that [[spoiler: Gandalf's alive]] out of the trailer, since he shows up at the end of the first fourth of the movie. Then again, he leaves shortly after not to return until the end, so it might have been feasible. The fact that he was also on all the merchandise for the film (and there was a ''lot'' of it) didn't help either.

* The people editing the trailer for ''Film/TheMachinist'' thought it would be a brilliant idea to hint at the plot twist at the end too heavily, [[spoiler:including the answer to the hangman game, "KILLER"]].
* ''Film/{{Magnolia}}'': Not a major twist, but posters for the movie reveal the final unexpected scenes of [[spoiler:frogs raining from the sky]].
* If you paid even the slightest bit of attention to the ending of one particular trailer for ''Film/{{Maleficent}}'', you'd see that [[spoiler:Maleficent's ''raven'' (who is a shapeshifter here) is turning into the dragon, not her]].
* The [[https://www.youtube.com/watch?v=Ue4PCI0NamI first theatrical trailer]] for ''Film/TheMartian'' spoils quite a few details of the story, most significantly [[spoiler:Watney using the Pathfinder probe to contact Earth, and his crewmates on ''Hermes'' going back for him in violation of [=NASA=]'s orders]].

** The trailer revealed that [[spoiler:Agent Smith was not only still alive, but has gone rogue and could replicate himself by jamming his hand into other people/programs.]] Though all of this was shown ''fairly'' early on in the film, many scenes were clearly meant to be reveals that would surprise and confuse the viewers, such as [[spoiler:the scene where Smith speaks to another Agent only for the camera to pan over and reveal the other Agent is also Smith.]]

* ''Film/{{Max|2015}}'': The extended trailer for that played in front of ''Film/JurassicWorld'' gave away that [[spoiler: one of Max's handler's squad-mates is after something in his "friend's" storage locker and is willing to harm the guy's father to get it]].

* The Dynasty Dragon re-release of the Creator/ShawBrothers action film, ''Film/MercenariesFromHongKong'', is promoted with an insanely spoilerific [[https://www.youtube.com/watch?v=xhULQcl4ymI trailer]] that gives away plenty of plot points, betrayals, a ColdBloodedTorture sequence involving a drill, and [[spoiler:how the main villainess meets her demise, by way of rocket launcher]] at the end.
* The trailer for ''Melvin and Howard'' shows mostly the last third of the film where [[spoiler: Melvin gets the will that names him as a heir to the Howard Hughes fortune]], as well as much of the ending while leaving out much of the family drama that takes up much of the first two-thirds.
* Several of the trailers for ''Film/MightyMorphinPowerRangersTheMovie'' spoil many of the movie's twists, including Ivan Ooze destroying the Command Center, the team traveling on a jungle planet and learning something called "Ninjetti", and much of the final fight against Ooze (complete with a shot in the first theatrical trailer of [[spoiler:the team holding their hands in the air as Zordon reforms, which is the second-to-last scene in the film]]).
* A more subtle example occurs in the trailer for ''Film/MillionDollarBaby'', which clearly shows [[spoiler: Maggie lying on the ground with a doctor kneeling over her]]. This one is somewhat excusable because they didn't actually show [[spoiler: her getting punched or landing on the stool before hand, and the viewer might not easily guess that she ends up paralyzed after this scene]]. Also to be fair, they also had the decency ''not'' to spoil [[spoiler: the incredibly dark turn taken by the last quarter of the film, where Maggie is paralyzed from the neck down and the story becomes about Frankie's efforts to cope with what's happened]].
* The trailer for the movie ''Film/TheMillionDollarHotel'' shows a scene of Jeremy Davies' character [=TomTom=] [[spoiler: confessing that he "went ahead and pushed him off"]].

* The trailer for ''Film/MontyPythonsLifeOfBrian'' gives away one of the funniest - and most unexpected - gags in the movie: [[spoiler: the [[BigLippedAlligatorMoment spaceship chase sequence]].]]
* The trailer for ''Film/{{Multiplicity}}'' gave away that the movie has four Creator/{{Michael Keaton}}s, a development that does not happen until about 80 minutes into the 120 minute movie. Though it's not so much that there ''is'' four of them, since the whole premise is basically ''CloningBlues: TheMovie'', but that [[spoiler:Keaton #4 is a copy of a copy, and is developmentally disabled as a result]].
* One trailer for ''Film/{{Morbius}}'' showed [[spoiler:the Vulture from ''Film/SpiderManHomecoming'', when in the movie itself he is only in TheStinger, undermining the UnexpectedCharacter impact.]]
* The trailer for ''Film/TheMuppetMovie'' includes the showdown sequence, with Kermit telling Doc Hopper if he's not so nice deep down then [[spoiler:to kill him, and Doc telling his henchmen to kill Kermit. Of course it doesn't show the outcome to that.]]
* In the trailer for ''Film/MuppetsFromSpace'', the very first Muppets that you see are none other than [[spoiler:Gonzo's family]].

** Most promotional materials for the film show [[spoiler:the climactic [[ItMakesSenseInContext Muppet Ladder]] used to save Miss Piggy]]. They don't specifically mention it, but it becomes extremely apparent once it occurs at the end of the film.
** A [[http://perezhilton.com/tv/Muppets_Most_Wanted_Adele_Dazeems_Let_It_Go_Review/?id=06d3ef5d0a73c#.V87vFvkrLIU commercial]] was also made in the wake of the "Adele Dazeem" indecent at the 2014 Oscars. Though brief (15 seconds), it gave away a pretty big spoiler: [[spoiler:the Muppets' new manager was bribing journalists to write good reviews for their less-than-stellar European tour.]]

* The trailer for the Martin Lawrence film ''Film/NationalSecurity'' gives away the film's ending where [[spoiler:Steve Zahn's character gets his job back and Lawrence fulfills his dream about being a cop]]... at the very beginning of the trailer. A few seconds later, you see the tail end of the film.
* ''Film/NationalTreasure2BookOfSecrets'' was pretty bad about trailer spoilers. Ben [[spoiler:kidnaps the president,]] Ben [[spoiler:was just kidding when it looks like he loses his hand to the eagle]], and the treasure is [[spoiler:hidden under Mt. Rushmore]]. It's pretty bad when a movie's trailers subject it to [[LateArrivalSpoiler You Should Have Forgotten This By Now]] spoiler tagging.

* The trailer of ''Film/NowYouSeeMe'' shows [[spoiler:Michael Caine's character ordering Morgan Freeman's character to expose and ruin the Four Horsemen.]] While this isn't as a bad a spoiler as some, given the movie's extra twists, it does completely deflate the tension out of an earlier scene where [[spoiler:Caine is trying to threaten and intimidate Freeman to refrain from exposing the Four Horseman that takes place before the Horsemen have double-crossed Caine.]]

** The fact that [[spoiler:humanity isn't completely dead]] and there's a [[spoiler:[[LaResistance resistance]] led by Creator/MorganFreeman]] would have been a great plot twist if it hadn't been included in the very first trailer. Fortunately, there are other twists that the trailer managed to omit.
** The Netflix splash screen is a clear image of [[spoiler:Tech 49 Jack Harper fighting Tech 52 Jack Harper]].
* If you pay close enough attention, the trailer for ''Film/OnlyLoversLeftAlive'' [[spoiler:shows the scene where Ian (Creator/AntonYelchin) is thrown into a pool of acid]].

* In ''Film/PaperTowns'', during their trip to find Margo, one of the major concerns the gang has is that they won't make it back in time for Prom. Many commercials for the movie reveal the scene where [[spoiler:the gang is dancing together at Prom]].
* New trailers for ''Film/ParanormalActivity'' show a shot of [[spoiler:Micah's body flying toward the camera]] from the final scene.
* The second trailer for ''Film/PetSematary (2019)’’ spoiled that in this version [[spoiler:it is Ellie who is killed and resurrected instead of Gage.]]
* ''Film/{{Philomena}}'' had [[https://www.youtube.com/watch?v=rG3QP8foCvg#t=1m53s one trailer]] [[spoiler:give away the fact that Philomena's son was Michael Hess]].

* ''Film/PiratesOfTheCaribbeanAtWorldsEnd'': The trailer clearly shows [[spoiler:Will Turner on the helm of the Flying Dutchman as he becomes Captain. You can even see the scar on his chest]].
** Every single trailer showed [[spoiler:Jack Sparrow, clearly back from the dead]]. Sure, it was pretty obvious that would be happening in the last movie, but it still might have been more tense had they avoided showing him at all in the trailers.
** Even the first trailer spoils to a lesser extent: when a viewer remembers that, in the trailer, they saw Jack standing in front of the gallows, they won't be concerned that [[spoiler:Jack is really dead when Barbossa impales him, since that scene hasn't happened yet]].
** One piece of merchandise for the third movie (which came out before the film) was called "Will Turner, [[spoiler:Captain of the Flying Dutchman]]".

* ''Film/{{Predator}}'': The theatrical trailer notably spoils [[spoiler:Dillon's death scene]], which comes near the end of the film and shows him being stabbed in the chest by the titular creature and screaming. It also shows the Predator without his cloaking ability (a reveal that doesn't happen until the team is down to one survivor) and also shows Dutch running from a massive explosion going off behind him, which is the climax of the film.
* The "shocking" revelation that [[spoiler:they're all not on Earth, but another planet]] in ''Film/{{Predators}}'' might have been more surprising if it hadn't been seen in EVERY theatrical trailer and TV spot.
* The theatrical trailer for ''Film/ThePrincessBride'' spoils [[spoiler:the Clergyman's funny voice, Count Rugen going into a battle stance before running away, the outcome of the battle of wits, and Wesley's "death"]].
* Apart from [[TrailersAlwaysLie glossing over the film’s comic tone]], the trailer to Paul Bartel’s ''Private Parts'' (1972) reveals the main plot twist from the end of the film.
* The trailer for ''Film/TheProfessional'' makes it abundantly clear that the film will end in an explosive showdown between Leon, Mathilda and Stansfield. [[spoiler:Additionally, observant viewers can deduce that Leon and Stansfield are going to die from the same grenade and Mathilda will escape the apartment to enroll at Spencer School in New Jersey]].
* The final trailer for Netflix’s adaptation of ''Theatre/TheProm'' spoils most of the plot of the movie, including glimpses of [[spoiler: Emma’s fake prom, Emma and Alyssa breaking up, and the inclusive prom at the end of the movie.]]
* All trailers for ''Film/{{Prometheus}}'' show things that happen in the last 10 minutes into the film. The same is true for one of the international posters advertising the film. [[spoiler:Namely, that the titular ship crashes into the alien vessel.]] To be fair, that was a very quick shot which only lasted about two seconds, so it's pretty easy to miss unless you've actually ''seen'' the movie.
* ''Film/{{Psycho}}'' unfortunately unveils the murderer's identity in the synopsis included with every home video release from 2008 onward. Some home video trailers even have the nerve to show [[spoiler:Norma Bates' stuffed corpse]]!

* In ''Film/Rampage2018'', the fact that [[spoiler:Ralph has flight membranes like a flying squirrel]] is left unrevealed through about 7/8 of the movie, and only revealed in the film's climax. However, it's one of the key moments in all the trailers.
-->[[spoiler:"Of ''course'' the wolf can fly."]]

* The green-band trailer for ''Film/RepoMen'' [[spoiler:appears to show the death of Liev Schreiber's character]], in addition to most of the plot.

* The trailer for ''Film/RockyIV'' completely spoiled the death of [[spoiler:Apollo Creed]] as one of the main plot points, so nobody was shocked when he did within the film. On the other hand, the trailer for ''Film/RockyIII'' averted this by giving no indication whatsoever [[spoiler:Mickey]] would die.
* The original ''Film/TheRockyHorrorPictureShow'' trailer shows parts of the last few minutes of the film, specifically [[spoiler:Columbia getting shot by Riff-Raff, the radio tower falling on Frank and Rocky, and the castle blasting off.]]
* The trailer for ''Film/{{Room}}'' shows that [[spoiler:Jack and Ma escape Room]]. Granted, this happens halfway through the story, but this might end up removing a lot of the tension out of the film's first half. However, chances are that this was intentional, as for one thing, a movie that [[spoiler:takes place entirely in one room]] might be hard to sell, but also, according to the film's director, "...The question posed by the first half is not so much ‘[[spoiler:How will they get the door open?]]’ but ‘[[spoiler:How will Jack have the courage to go through it, and Ma the courage to let him?]]’
* The two-minute long trailer of ''Film/TheRoom'' is essentially a mini-version of the film itself, giving away every plot twist and development [[spoiler:with the exception of Johnny's suicide]].
* ''Film/{{Rope}}'' drew all its drama from the fact that they [[spoiler:hid the corpse in the trunk and whenever someone would open it.]] Too bad that the [[https://www.youtube.com/watch?v=VCFP6vDkSUE trailer]] included the climactic shot of [[spoiler:the trunk flying open and the ensuing fight.]]

* The trailers for ''Film/ScottPilgrimVsTheWorld'' give away the fact that [[spoiler:one of Ramona's exes is not an ex-''boy''friend]] which was supposed to be a minor twist.

* Both trailers for ''Film/{{Seventh Son|2015}}'' show [[spoiler:the death of Kit Harrington's character]], which is intended to be a shock death that happens within the first third of the film.
* ''Film/ShadowInTheCloud'': The trailer shows that the plane crashes and Maude fights the gremlin in the ocean afterward. If you pay close enough attention, it also shows exactly which crew members are still alive after the crash. Finally, one of Maude's more impressive near-death experiences ([[spoiler:falling out the bomb bay doors but being blown back in by the force of an explosion]]) is shown.
* The menu screen on the first edition DVD release of ''Film/TheShawshankRedemption'' uses the pivotal scene of Andy Dufresne [[spoiler:escaping from Shawshank by crawling through a sewage pipe]] as its background. This is particularly JustForFun/{{egregious}} as the movie was something of a sleeper hit, so many viewers would not have already seen it in theaters. The trailer itself contains a major spoiler. The scenes leading up to [[spoiler:Andy's escape]] are obviously intended to create a credible suspicion that he has committed suicide. The trailer entirely gives away the conclusion to this suspenseful scene.
* The trailer for ''Film/{{Sideways}}'' reveals that [[spoiler:Miles accidentally lets slip that Jack is getting married, and Stephanie beating Jack up when she finds out]].
* In some trailers of the movie ''Film/TheSignal2014'', we can see [[spoiler:Nic, with his bionic legs, sprinting at supersonic spedd across a bridge where he hits an invisible barrier and breaks through]]. This happens less than five minutes before the credits roll, being the [[TheReveal ultimate reveal]] in the film.

* The trailer of ''Film/TheSixthSense'' spoiled a major revelation, which made a large chunk of the film rather lame since everyone knew what was going on. Luckily, that's not all there is to it. That said, the soundtrack album does give away a fairly major plot twist in the title of the final track [[spoiler:("Malcolm Is Dead")]].

* The trailer for ''Film/SnakeEyes'' reveals that [[spoiler:Gary Sinise is the villain]], even though this is supposed to be a twist revelation over half an hour into the film.

* ''Film/{{Solanin}}'''s trailer spoils [[spoiler:Taneda's death and Meiko taking his place in the band.]] Which is kind of the whole plot.
* The first trailer for ''Film/SonicTheHedgehog2020'' ends with [[spoiler:Dr. Robotnik marooned on a mushroom world, having gone bald, and sporting a giant mustache – making him resemble his [[VideoGame/SonicTheHedgehog videogame counterpart]]]], which only happens in the first [[TheStinger stinger]].

* The final trailer for ''Film/SpaceJamANewLegacy'' has a blink-and-you'll-miss-it shot of [[spoiler: a banner that says "Tunes Win!"]].

** The ''Film/SpiderMan3'' trailer shows Spider-Man's new popularity, Peter's decision to marry Mary Jane, Harry attacking Peter as the New Goblin, Harry being hospitalised, Sandman's origin, Peter discovering that Sandman killed his uncle, being taken over by the symbiote and turning evil, fighting Sandman, Sandman being dissolved in water, Peter fighting Eddie Brock, throwing a bomb at Harry, hurting Mary Jane, realising he's gone too far and tearing the black suit off. The online version of the first trailer had a stinger that showed [[spoiler:a bit of the symbiote fall on Eddie, and it ends with a shot of Venom.]]

** The trailers for ''Film/TheAmazingSpiderMan2'' are possibly the worst offender, because it practically shows ''[[ExaggeratedTrope every major detail in the plot]]''. It shows Peter trying to balance his relationship with Gwen Stacy, his tension with his returning friend Harry Osborn, Norman Osborn's death, Max Dillon's obsession with Spider-Man, his transformation into Electro, his fight with Spider-Man in Times Square, [[spoiler:Electro teaming up with Harry, Spider-Man defeating Electro in the climax, Harry becoming the Green Goblin and killing Gwen, Gustav Fiers planning to form the Sinister Six, and Spider-Man confronting the Rhino (the last scene of the movie).]]

** One of the final TV spots for ''Film/StarTrekBeyond'' shows that Creator/IdrisElba's Krall [[spoiler:WasOnceAMan]], something that's treated as an actual twist in the movie.

** The theatrical trailer for ''Film/ThePhantomMenace'' spoils a climactic death. [[spoiler:Obi Wan screams "[[BigNo NO]]!" in the trailer, and there's a shot of Qui-Gon in pain during the BigNo.]]

*** The marketing went to great lengths to avoid a repeat of the ''Phantom Menace'' and Count Dooku situations by deliberately holding off on releasing any merchandise or action figures hinting that [[spoiler:Rey becomes a Jedi and is the true protagonist of the movie]]. This caused a bit of a backlash since people accused Disney of downplaying the character for sexist reasons, but once the film was out in theaters for several weeks, a new wave of merchandise prominently featuring [[spoiler:Rey]] was released.
*** However, the trailer for the ''Force Awakens'' play set in ''VideoGame/DisneyInfinity'' had a FreezeFrameBonus that played this trope straight. The ending showed a recreation of the fight between Finn and Kylo Ren (which was heavily played up in the pre-release stuff for the movie), but slipped in a brief shot showing [[spoiler:Rey wielding Anakin's lightsaber against the villain]].

** The home media ads for ''Film/TheLastJedi'' show [[spoiler:Yoda as a Force Ghost]].
* In ''Film/TheSumOfAllFears'', the trailer reveals that [[spoiler:a nuclear bomb goes off in a major downtown city, with Morgan Freeman's character only realizing it while he's sitting with the President in the middle of a crowded stadium]].
* The trailer for ''Film/SupermanIII'' showed that not only does [[spoiler:Gus Gorman (''Creator/RichardPryor'')]] become a [[spoiler:good guy]], but that [[spoiler:Superman beats the computer]]. Granted, it's a Superman film so you probably could have figured out that last part, but still.
* The entire campaign for ''Film/{{Surrogates}}'' was a spoiler: [[spoiler:James Cromwell's character (who invented the surrogates) describes them as "an addiction", which makes him easy to guess as the killer, and every trailer and TV spot showed the surrogates shutting down and collapsing in the street, which is the ending to the movie.]]
* The regular promo for ''Film/TheSwap'' on Disney Channel spoils the scene where [[spoiler:Ellie and Jack are getting their bodies switched back to normal.]]

* The horror anthology ''Film/TalesFromTheHood'' trailer spoiled quite a bit of the film... including the end of the framing sequence that connected the tales together [[spoiler:where the mortician turned out to be Satan himself.]]

** The second trailer shows [[spoiler:Leo, Mikey, and Donnie getting kidnapped by the Foot Clan, with Raph having to go rescue them]]. And Splinter [[spoiler:getting beaten by Shredder, being put into critical condition]].
** The second trailer also gives away that [[spoiler:Eric Sacks is not the Shredder; he's just working for the guy]].

** The trailers for ''Film/TerminatorSalvation'' give away the fact that [[spoiler:Marcus is a Terminator, something that's set up as a big reveal in the film.]]
** ''Film/TerminatorGenisys'' gets hit with this with it's second official trailer where, [[spoiler:it's revealed that Skynet has created a Terminator clone of ''John Connor'' himself. At least it's oblique enough for the movie to still a shock once it's revealed that it's actually the original John Connor post-UnwillingRoboticisation.]]
* Subverted in ''Film/TimeTrap''. The trailer clearly shows that there is significant TimeDilation in the cave, with one of the characters saying that they could have been inside the cave for weeks or even months, even though they only experienced about an hour or so. [[spoiler:what the trailer does not spoil is that the time dilation is [[YearOutsideHourInside a year outside, a second inside, meaning that they had been inside the cave for four ''thousand'' external years]].]]

* The marketing campaign for ''Film/TopGunMaverick'' took pains to keep footage from the film's third act as vague as possible. [[https://vimeo.com/762446930 A Memorial Day TV spot]], however, spoiled far more than it intended, with shots including [[spoiler:Maverick sitting in a cockpit that's exploding behind him (seen when he pulls the HeroicSacrifice to save Rooster), the daring maneuver that leads an Su-57 pilot to inadvertantly destroy his disabled co-pilot's aircraft (as Maverick flies around the latter), and Rooster (very noticeably sitting in the ''backseat'' of a jet) cheering as the plane explodes behind him]], spoiling that there's more to the film after the climactic operation to destroy the nuclear enrichment facility..
* ''Film/TotalRecall1990'''s main trailer is the majority of the movie, especially several of the best parts, including Quaid rolling out onto the surface of Mars as the reactors come online and the one-liner [[spoiler:("Consider that a divorce!")]].
* The trailer for ''Film/TheTown'' has a fairly mild example, in that [[spoiler:the last line in the trailer is actually the last line in the film.]] Granted, it's tough to tell outside of context.

*** Late trailers go out of their way to reveal [[spoiler:[[BackFromTheDead Megatron's return]]]]. To be fair, anyone who thought [[spoiler:Megatron wouldn't back for the sequel]] really [[LateArrivalSpoiler should've known]] [[JokerImmunity otherwise]].
*** [[spoiler:Devastator]] would have been a kickass awesome surprise. He just ended up being kickass awesome.
*** There were also several TV spots released, and made available on the director's website, that showed the entire Sideways chase-sequence, [[spoiler:including his death at the bladed hands of Sideswipe]].
** The theatrical trailer for ''Film/TransformersDarkOfTheMoon'' clearly revealed [[spoiler:Starscream's death, while later TV spots even showed glimpses of how it happens]]. Likewise, the TV spots spoiled [[spoiler:the death of Shockwave, showing how Optimus punches a hole in him]].
* The teaser trailer for ''[[Film/{{Twilight}} The Twilight Saga: Breaking Dawn - Part 2]]'' spoiled the revelation that [[spoiler:Bella becomes a vampire]].

* One of ''Film/UndercoverBrother'''s trailers specifically said that Penelope Snow was [[spoiler:White She Devil, AKA "Black Man's Kryptonite"]], which was a major reveal/surprise.

* ''Film/Venom2018'': In a manner similar to ''Film/TheAmazingSpiderMan2'' (which featured the final shot of the movie as a prominent part of its marketing), the second trailer does something similar by showing most of the final scene -- [[spoiler:Eddie[=/=]Venom finally stands up to (and subsequently eats) the thug who is running a protection racket on Mrs. Chen's convenience store, complete with his signature line ("We... are Venom.") and final joke ("Oh... I have a parasite. Goodnight, Mrs. Chen!")]] The second trailer also reveals that Riz Ahmed's character, Carlton Drake (the BigBad), is possessed by a symbiote named Riot, which occurs three-quarters of the way through the film.

* There is no reason to see the film ''Film/WarmBodies'' because the trailer casually spoils the fact that it's a reverse parody of ''Film/{{Twilight}}'' where the zombie boy gets turned back into a human by the love of a human girl. Unless the producers do a DoubleSubversion where she gets turned and the plot occurred for naught, but since this is Hollywood, they'll never do anything ''that'' creative. [[spoiler:Or would they?]]

* The original theatrical trailer for ''Film/WhatEverHappenedToBabyJane'' makes a point at the end of trying not to spoil the film, yet there is still a glimpse at the part where [[spoiler:Blanche is tied up to her bed]].
* The trailer for Creator/WoodyAllen's ''Film/WhateverWorks'' shows [[spoiler:Boris's second suicide attempt]], which occurs near the end of the movie.
* The trailers for ''Film/WhatLiesBeneath'', they reveal the identity of the ghost, which makes watching the wife [[spoiler:sneak around suspecting the neighbor of killing his wife]] painful and awkward to watch. However, the trailer doesn't give away that [[spoiler:Harrison Ford is the bad guy]].
* Promotional material for ''Film/WhatsTheMatterWithHelen'' visibly shows [[spoiler:Adelle's corpse tied to a ladder]], completely ruining the film's CruelTwistEnding. The film's ad campaign was roundly criticized for spoiling the ending, and apparently led to film studios becoming much more careful about doing so.
* In ''Film/WhatWeDoInTheShadows,'' it's a surprise when [[spoiler:Nick]] is turned into a vampire. The trailer focuses heavily on [[spoiler:him]] as a vampire.

** The trailer for ''Film/XMenOriginsWolverine'' inadvertently revealed Weapon XI, whom Wolverine fights at the end of the film. And [[http://splashpage.mtv.com/2009/02/19/x-men-origins-wolverine-spoilers-in-new-deadpool-action-figure/ the toy packaging]] spoiled that he is [[spoiler:ComicBook/{{Deadpool}}]].

** The first trailer concealed the reveal of [[spoiler:X-24]] for ''Film/{{Logan}}'' except for one shot.

* [[https://www.youtube.com/watch?v=ksnwIUyspps This trailer]] for the 1999 ''Film/AnimalFarm'' film may be more respectful to the film than [[NeverTrustATrailer the rest of the promotion]], but it also spoiled [[spoiler:the corruption of the pigs by the end of the movie]].

* You know the part of the trailer for ''Film/{{Quarantine}}'' where the lady gets dragged screaming into the darkness? ''That was the ending to the movie.'' This is also featured on the DVD cover, TV spots, ''and every piece of marketing for the film.''

* Some TV spots for ''Film/GuardiansOfTheGalaxy'' showed off Baby Groot, which made it kind of obvious how he came back from his HeroicSacrifice.

* The home media ads for ''Film/Shazam2019'' show [[spoiler:Billy's foster siblings in their super hero forms]].

* ''Film/{{Collateral}}'' treats Tom Cruise/Vincent's occupation as a secret, but you already knew it if you saw any promotion at all. Even critics were unsure how to treat this bit of information, most saying something to the effect of "I guess this is a spoiler, but it's already spoiled." In a hilarious bit of probably accidental hypocrisy, [[http://rogerebert.suntimes.com/apps/pbcs.dll/article?AID=/20040806/REVIEWS/408060302/1023 Roger Ebert's review]] kindly tells you not to finish reading it if you don't already know, but the picture and caption at the top of the webpage give it away anyway.

* The teaser for ''Film/{{Elysium}}'' was fairly opaque, but one of the full-length trailers has two specific shots (Max yelling "I have five days to live!"; Max carrying the IllGirl) that give away pretty much the entire plot. Another goes into even more detail, basically summarizing the entire first half-hour.

* The [[https://www.youtube.com/watch?v=jxf73ebZfeY trailer]] for the ridiculous and sub-par SlasherMovie ''Detention'' (2010) (best known as one of [[Series/KungFu David]] [[Film/KillBill Carradine's]] last appearances before his rather unusual death) tells you absolutely ''everything''. Who our group of victims is, who gets killed, the [[SinsOfOurFathers entire back-story]] for the killer's rampage, exactly which two characters survive until the end, and who the LargeHam killer is. About the only detail it leaves out is whether or not those last two make it to the end-credits, but it's a ForegoneConclusion.

* The trailer of ''Film/{{Hardware}}'' is a serious contender to be the most egregious example of this trope, for its trailer is basically just a 2-minute cut of the movie. It works as a short film of the same plot all by itself. The actual movie just adds a couple of subplots, minor characters and one obvious plot twist to the end.

* A trailer for ''Film/TheIncredibleHulk'' shows Creator/RobertDowneyJr appearing as [[Film/IronMan1 Tony Stark]]. This is ''the last scene in the movie''. Besides that, the theatrical trailer shows you everything else in the movie: that the Hulk is being pursued around the world by an elite military force, that one member has a pretty bad grudge against him, that they capture the Hulk and derive a Hulk-making serum from him, which they use on said soldier, which turns him into another Hulk, and the two have a big showdown fight.

** The "final" trailer goes one step further and spoils the biggest reveal of the third act -- that '''the original Ghostbusters''' (Ray, Peter and Winston) get involved in the plot, with a body shot of three proton wands being aimed at the camera, with Peter saying, "Have you missed us?" As a result, the comparable sequence in the film proper (where [[spoiler:Callie and the other kids are unable to fend off Gozer, prompting the surprise arrival of the original team]]) to be slightly less impactful if you've already seen the trailer.

* The [[https://twitter.com/gbafterlife/status/1447568930772602894?s=21 final trailer]] for ''Film/GhostbustersAfterlife'' spoils a major reveal that the cast and crew took pains to keep secret even during early screenings -- [[spoiler:a character (suggested to be Egon Spengler) is shown crashing the Ecto-1 in a field, along with hunting and trapping a ghost in Summerville, prior to the events of the story]]. It also shows a shot of [[spoiler:Callie (played by Carrie Coon) dressed in an outfit that looks suspiciously like that of Dana Barrett [a.k.a. the Gatekeeper] from the original film, as well as four distinct proton beams being shot at something as the teenage characters look on in awe]]. Notably, this trailer leaked several weeks prior to the film's release, and resulted in fans encouraging people ''not'' to watch it, citing this trope.

* [[https://m.youtube.com/watch?v=o9ri5DYLvkU The Book to Screen featurette]] of''Film/CliffordTheBigRedDog'' shows [[spoiler: the drawing from the end of the film where it is revealed Uncle Casey got a job.]]