* BetterThanCanon: An amazing case. Not only do many fans like this version of the story better than in the comics, Judd Winick, who wrote both the original comics story and this movie, [[CreatorPreferredAdaptation considers the movie the better version]].
* CompleteMonster: ComicBook/TheJoker once again defines himself as a {{sadist}}ic lunatic. Joker opens up the film by brutally beating the [[WouldHurtAChild young Jason Todd]], the second ComicBook/{{Robin}}, to a bloody pulp with a {{crowbar|Combatant}}, before leaving him to die in an explosion he sets off. After Joker is released by a reluctant Black Mask from Arkham Asylum to kill Red Hood, Joker demonstrates his random violence by [[SlashedThroat slitting the throat]] of one of his guards and shooting the other four dead, and soon after backstabs Black Mask by gagging him and the members of both his and Red Hood's gang, intending to [[ManOnFire burn them all alive]] for the purpose of getting Red Hood's attention. Once it's revealed Red Hood is in fact [[spoiler:a resurrected Jason Todd]] and Batman turns the tides against Red Hood in the final confrontation, Joker tries to pin Batman down for the purpose of dying with both his arch-rival and Red Hood in an exploding building, absolutely ecstatic that he gets to die getting everything he wants. [[EvenEvilHasStandards Even the hardened kingpin Black Mask]] is wary of the Joker, and Batman himself reveals he contemplates killing the Joker every day of his life for the clown's atrocities, [[ThouShaltNotKill only relenting]] to prevent himself from becoming just like those he opposes. As true to his darker interpretations, the Joker was a [[AxCrazy psychopath]] motivated by [[ForTheEvulz random whims]] at best, and a desire to hurt Batman at worst.
* CounterpartComparison: A ''lot'' of people noted Red Hood's resemblance to SelfDemonstrating/{{Deadpool}} when the first trailers went online. The similarities are even more marked in the actual film, where the character behaves near-identically to Deadpool in the latter's earlier appearances.
* CrossesTheLineTwice: The Joker's reaction to finding out that [[spoiler: Jason Todd]] was behind it all is to ask for a picture of the pair "[[ComicBook/ADeathInTheFamily with the crowbar]]".
* EnsembleDarkhorse: In ''spades''. There's Nightwing, the Fearsome Hand of Four, and Ms. Li.
* FoeYay: The Joker interrupting Batman's TearJerker speech by saying "aw, so you ''do'' think about me!" In the Joker's typically disturbing fashion, he says this while Batman is saying that [[spoiler:not a day goes by where he doesn't think about killing the Joker]].
* SugarWiki/HeReallyCanAct:
** Many a fan doubted that Creator/JohnDiMaggio could pull off the Joker, but once they actually saw the movie, they quickly changed their minds.
** Creator/JensenAckles as Jason raised some eyebrows, but he silenced everyone with a heartbreaking performance, especially in his final scene.
* ItWasHisSled: [[spoiler:A resurrected Jason Todd, the second Robin, is the Red Hood.]] For comic book fans, this is common knowledge and the film barely tries to treat it as a genuine mystery for long.
* JerkassWoobie:
** [[spoiler: Jason Todd/Robin II/Red Hood.]]
** Ra's al Ghul. Despite his being a ruthless supervillain who, as Batman says, has never shied away from shedding blood, his deep remorse and sorrow over [[spoiler:Jason's fate, resurrection, and subsequent rampage]] are clearly heartfelt and genuine.
* LikeYouWouldReallyDoIt: Red Hood tossing a gun to Batman and telling him to shoot Joker.
%%* MagnificentBastard
* MemeticMutation: Variations of this piece of dialogue, swapping out Batman, Jason and Joker for other characters/parties:
--> '''Jason Todd:''' Bruce, I forgive you for not saving me. But why, why on God's Earth...is he [Joker] still alive?!
* MoralEventHorizon: The Joker crosses his in the film's opening scene, as he savagely beats Jason, then leaves him to die.
** Jason killing the Joker would not be this. Him [[spoiler: handing Batman the pistol and telling him ''he'' has to do it qualifies to some.]]
* OneSceneWonder: Creator/JasonIsaacs as Comicbook/RasAlGhul.
* StrawmanHasAPoint: Like in the comic, Red Hood raises a good point on the naivety behind the idea that someone like [[JokerImmunity the Joker can continue to walk the earth]] even though he'll continue to kill thousands. And the fact that it's a logical fallacy to say killing the Joker would make Batman accept killing any criminal, when Joker has been the one villain who has never shown ''any'' capability of possible redemption in any form, unlike the rest of the Rogues Gallery. He's also right about Batman not being able to stop crime -- how long has Batman been trying without any success? And sometimes he even manages to make it worse.
* WTHCastingAgency:
** Reactions to Creator/JohnDiMaggio's casting as Joker were... mixed, to say the least. The release of the character models featuring a somewhat burlier Joker eased concerns somewhat. And then the film was released and a lot of those who doubted he could pull off the role did a complete 180.
** Audiences were also skeptical of Creator/JensenAckles playing a lead character, as he had never done voice acting work prior to this film. Again, he proved them wrong.
** And anyone other than Creator/KevinConroy as Batman raises suspicions. But Creator/BruceGreenwood did a good job, especially as a Batman who's supposed to be a little older than we normally see him. Greenwood would later reprise the role for ''Series/YoungJustice'' where he recieved even more praise as a Batman who's decidedly a very good and encouraging mentor.