History YMMV / X2XMenUnited

* AccidentalAesop: Make sure your devices have proper security to prevent them from being hacked. After Mystique tampers with Cerebro in the previous film, Xavier doesn't seem to have upped the security, meaning Stryker is able to hack it ''again''.

* CantUnHearIt: Creator/AlanCumming as ComicBook/{{Nightcrawler}}.
** Actually I can, quite easily. First off, they messed up Nightcrawler's appearance. Whereas in the comic books he has blue fur (which at one issue of ''ComicBook/ExcaliburMarvelComics'' is described as "like blue velvet'') in the movie he seems to be covered in lumpy blue paint, with weird scars that wouldn't show on fur. It makes me think that someone on the production team said "he's blue? sounds like a Celtic warrior" and called it a day.

** Actually I can, quite easily. First off, they messed up Nightcrawler's appearance. Whereas in the comic books he has blue fur (which at one issue of ''ComicBook/ExcaliburMarvelComics'' is described as "like blue velvet'') in the movie he seems to be covered in lumpy blue paint, with weird scars that wouldn't show on fur. It makes me think that some said "he's blue? sounds like a Celtic warrior" and called it a day.

* AuthorsSavingThrow: Wolverine's going full berserker rage against Stryker's troops was likely done to address the fact that he didn't kill anyone in the first film.

** How much control over his own actions does Jason have? Stryker's lobotomy has clearly rendered Jason entirely docile and obedient to his father, but he still retains enough of his faculties to use his powers to control Xavier's mind, and must have some capacity to do things Stryker ''didn't'' tell him to do since he used another illusion to trick Storm and Nightcrawler when they entered Cerebro. For that matter, it's ambiguous if he actually understands that Stryker is using him to commit mass genocide or not -- and if he does, is it because he's just ''that'' loyal to his father that he'll do it, or does he share his father's hatred of mutants and Xavier?

* UnintentionallySympathetic: Pyro snapping and fireballing the cops at the Drakes' house. It's meant to be a sign that he's about to make a FaceHeelTurn. But in the span of about twelve hours, he got flushed out of his own school and had to flee armed soldiers in the middle of the night, the cops were called on him and his friends when they didn't do anything wrong, ''and'' Logan was just shot in the head in front of them; Pyro doesn't know about his healing ability, so he'd obviously think he was dead and they could be next. It's not only fairly understandable the kid would snap, his actions are borderline self defense.

* FunnyAneurysmMoment: The Phoenix appearing in Alkali Lake is treated optimistically, with triumphant music to boot. However, the sequel reveals she is a complete psychopath who overrode Jean's original personality.

* WhatAnIdiot: Yuriko finds a janitor inside an office with vital information that requires her own fingerprints to enter, but she lets him out without too much fuss. Surprise, he was actually an enemy agent, and now he has the location of Magneto's cell! Although it's easy to think Ms. Oyama's brainwashing would have stunted her judgement, the fact that she does office work for Stryker's secret projects in the first place establishes that she ''should'' be perfectly capable to think rationally.

** Blog/UnshavedMouse found a lot between Wolverine and Iceman in their scene in the kitchen. Without context -- Iceman blows on Wolverine's coke bottle to cool it down.

** So, so much between Wolverine and Stryker, thanks to the subplot of Stryker being the key to his lost memories. When they first see each other after years and are they separated by a wall of ice from Iceman, the two invoke a WindowLove moment with the other's shadow on the ice. When Mystique is attempting to seduce Wolverine, she first takes on the form of Jean, then Rogue, then ''Stryker'', as she says "what do you ''really'' want?" Also, Stryker speaks of thinking Wolvering was one of a kind before admitting he was wrong, as he sics Lady Deathstrike on him; the implication she's a ReplacementGoldfish for Wolverine is hard to ignore.

* CompleteMonster: [[MadScientist The Professor]], real name Truett Hudson, is a mastermind behind the Weapon X project, an experiment designed to create the perfect killing machine. To this end, the Professor [[PlayingWithSyringes experiments]] on a least a dozen people, turning them into mindless feral mutants, before he gets his hands on Victor Creed, aka [[Characters/MarvelComicsSabretooth Sabretooth]], and Logan, aka ComicBook/{{Wolverine}}. Kidnapping the two, the Professor commits a number of painful experiments on them, wiping their minds and turning them into [[SuperSoldiers perfect soldiers]]. When Logan escapes and confronts the Professor, the latter informs him that he injected all Weapon X subjects with the Shiva Virus, which would kill them in a few years, leading to Logan starting to search for the cure several years later.

* UnintentionallySympathetic: Pyro snapping and fireballing the cops at the Drakes' house. It's meant to be a sign that he's about to make a FaceHeelTurn. But in the span of about twelve hours, he got flushed out of his own school and had to flee armed soldiers in the middle of the night, the cops were called on him and his friends when they didn't do anything wrong, ''and'' Logan was just shot in the head in front of them; Pyro doesn't know about his healing ability, so he'd obviously think he was dead and they could be next. It's fairly understandable the kid would snap.

* CompleteMonster: [[MadScientist The Professor]], real name Truett Hudson, is a mastermind behind the Weapon X project, an experiment designed to create the perfect killing machine. To this end, the Professor [[PlayingWithSyringes experiments]] on a least a dozen people, turning them into mindless feral mutants, before he gets his hands on Victor Creed, aka [[Characters/MarvelComicsSabretooth Sabretooth]], and Logan, aka Franchise/{{Wolverine}}. Kidnapping the two, the Professor commits a number of painful experiments on them, wiping their minds and turning them into [[SuperSoldiers perfect soldiers]]. When Logan escapes and confronts the Professor, the latter informs him that he injected all Weapon X subjects with the Shiva Virus, which would kill them in a few years, leading to Logan starting to search for the cure several years later.

** Yuriko has barely any role in this film beyond acting as Stryker's mind-controlled bodyguard, but her incredible fight scene with Wolverine and her tragic death made her very popular. There were even plans to bring her back in the sequel, though it was canned when Bryan Singer declined to direct it. Fans would have to settle for a small ShoutOut in ''Film/XMenDaysOfFuturePast'', when a Sentinel briefly uses her power to impale Sunspot. She also survived in the official game which shows she was a pupil of the Silver Samurai, though whether this is canon is uncertain.

** Yuriko has barely any role in this film beyond acting as Stryker's mind-controlled bodyguard, but her incredible fight scene with Wolverine and her tragic death made her very popular. There were even plans to bring her back in the sequel, though it was canned when Bryan Singer declined to direct it. Fans would have to settle for a small ShoutOut in ''Film/XMenDaysOfFuturePast'', when a Sentinel briefly uses her power to impale Sunspot.