* ActorAllusion:
** Near the end of the game, Hugo Strange says "This is just the beginning", a line said near the end of ''Film/AttackOfTheClones'' by Count Dooku, who Corey Burton [[WesternAnimation/StarWarsTheCloneWars has played]].
** A subtle one: Joker attempts to force Mr. Freeze to develop a cure for him by holding his wife hostage. Joker is voiced by Creator/MarkHamill, whose first voice in ''WesternAnimation/BatmanTheAnimatedSeries'' was Ferris Boyle, the guy responsible for Mr. Freeze, and Mark's performance as him also landed him with his voicing SelfDemonstrating/TheJoker in that series. Furthermore, by reading one of the riddles called "Who can BOYLE and Freeze at the same time?" and listening to the Mr. Freeze audio tapes, you find out that Ferris Boyle is canon in the Arkhamverse.
** MPT Anne Bishop is voiced by Kimberly Brooks. Given the character's looks and personality (her first question when Batman rescues her is where's Riddler, clearly intending to remove his spine), chances are that [[Franchise/MassEffect Ashley Williams]] will come to mind.
** Catwoman is voiced by Music/GreyDeLisle so chances are she'll remind some people of [[WesternAnimation/TUFFPuppy Kitty Katswell]].
* BeamMeUpScotty: Many have misquoted or misinterpreted Mark Hamill as saying this game will be the last time he plays The Joker. He clarified that what he meant was he wouldn't continue playing The Joker if he felt that he couldn't top his performance, he wanted to leave on a high note.
** That said, [[https://twitter.com/#!/HamillHimself/status/126561371197419520 this]] would seem to suggest that he has no plans to play the Joker again in the future.
*** Alternately, it could be talking about [[spoiler:Joker's death at the end of the game]].
** [[spoiler: Then there is the fact that Endgame shows his body being cremated. As if telling the fans "he isn't coming back".]]
* CastingGag: Creator/FredTatasciore as Solomon Grundy. He's also known for playing ComicBook/TheIncredibleHulk, another [[AmazingTechnicolorPopulation green]] [[TheDreaded monster]] with [[TheBrute enormous strength]], [[HulkSpeak broken speech]], and [[DumbMuscle limited intelligence]].
* FanNickname: Robin's is [[MythologyGag Robin]] [[VisualPun Hood]].[[labelnote:*]]In his very first appearance, Dick Grayson said his name was "Robin, as in Robin Hood... not robbing hoods!"... hey, it was [[TheGoldenAgeOfComicBooks 1940]].[[/labelnote]]
* HeyItsThatVoice
** As in [[VideoGame/BatmanArkhamAsylum the first game]], Creator/KevinConroy and Creator/MarkHamill are again reprising the roles of [[WesternAnimation/BatmanTheAnimatedSeries Batman and the Joker]]. Kevin also plays [[spoiler:Thomas Elliot]].
** Likewise returning from the first game:
*** Creator/TomKane as Quincy Sharp, though he doesn't reprise the role of Commissioner Gordon.
*** Kimberly Brooks as Oracle. She's also the voice of Anne Bishop.
*** Creator/WallyWingert as the Riddler.
*** Tasia Valenza as Poison Ivy, though she doesn't reprise the role of Martha Wayne.
*** Creator/FredTatasciore as Bane. He also provides the voices of Mr. Hammer and Solomon Grundy.
*** Danny Jacobs as Victor Zsasz
*** Creator/SteveBlum as Killer Croc. He also provides the voice of Sickle.
*** James Horan as Jack Ryder.
*** Duane R. Shepard Sr. as Aaron Cash.
*** Chris Cox as Eddie Burlow. He also provides the voice of Deadshot.
*** Roger Rose as William North.
*** While he doesn't reprise the role of a young Jim Gordon, Creator/RickDWasserman instead voices [[spoiler: Clayface]].
** New to the series:
*** Stana Katic ([[Series/{{Castle}} Kate Beckett]]) is Talia al Ghul.
*** Creator/DeeBradleyBaker is Ra's Al Ghul. [[note]]He was previously the Scarecrow on ''WesternAnimation/BatmanTheBraveAndTheBold''.[[/note]]
*** Creator/MauriceLaMarche is Mr. Freeze and Calendar Man.
*** Creator/DavidKaye takes over the role of Commissioner Gordon from Tom Kane.
*** Creator/TaraStrong is Harley Quinn. [[note]]Her past Batman credits include Batgirl in the third season of ''WesternAnimation/BatmanTheAnimatedSeries'', Vicki Vale in ''WesternAnimation/TheBatmanVsDracula'', and Huntress in ''WesternAnimation/BatmanTheBraveAndTheBold''.[[/note]]
*** Music/GreyDeLisle is Catwoman, Vicki Vale, Stacy Baker, and takes over as Martha Wayne from Tasia Valenza. [[note]]Like Tara Strong, she did voices in the {{DCAU}} incarnation of Batman (she, along with the returning Tasia Valenza voiced the two servant girls sent to look after Max in the second part of "Curse of the Kobra" on ''WesternAnimation/BatmanBeyond''), ''WesternAnimation/TheBatman'' (most notably, Robin's mother and a {{Gender Flip}}ped version of Vulture of the Terrible Trio), and ''WesternAnimation/BatmanTheBraveAndTheBold'' (ComicBook/BlackCanary).[[/note]]
*** Creator/TroyBaker is Two-Face and Robin.
*** Creator/NolanNorth is [[PlayingAgainstType Penguin]] and Black Mask, using a cockney English accent for the former.
*** Hugo Strange is voiced by Creator/CoreyBurton, [[VideoGame/KingdomHearts once]] [[WesternAnimation/StarWarsTheCloneWars again]] [[WesternAnimation/ThunderCats2011 emulating]] ChristopherLee.
*** Peter [=MacNicol=] ([[WesternAnimation/JusticeLeague Chronos]], [[WesternAnimation/TheSpectacularSpiderMan Doctor Octopus]], [[WesternAnimation/HarveyBirdmanAttorneyAtLaw X the Eliminator]]) is the Mad Hatter. [[note]]He was previously Kirk Langstrom/Man-Bat on ''WesternAnimation/TheBatman''.[[/note]]
*** Creator/KharyPayton is [[spoiler: Azrael]].
*** Creator/KariWahlgren is the League of Assassin member whom Penguin captured and Batman later persues.
*** Martin Jarvis ([[VideoGame/MassEffect2 Zaal'Koris vas Qwib-Qwib]], [[WesternAnimation/TheLifeAndTimesOfJuniperLee William]], [[WesternAnimation/TheGrimAdventuresOfBillyAndMandy Nergal]]) is Alfred.
*** Creator/QuintonFlynn is Nightwing (or rather, [[TheVoiceless his grunts]]).
*** Creator/EricBauza is Adam Hamasaki.
* TheOtherDarrin: Creator/TaraStrong replaces Arleen Sorkin as Harley Quinn, DavidKaye replaces Creator/TomKane as Commissioner Gordon, and Music/GreyDeLisle replaces Tasia Valenza as Martha Wayne. The latter two are perplexing since, as noted above, Tom and Tasia returned from the first game to reprise the respective roles of Quincy Sharp and Poison Ivy.
* PlayingAgainstType:
** Creator/NolanNorth as Penguin.
** Creator/DeeBradleyBaker as Ra's al Ghul.
** Creator/MauriceLaMarche as Mr. Freeze and Calendar Man.
** Creator/TaraStrong as Harley Quinn.
* TalkingToHimself: Creator/NolanNorth voices both [[LondonGangster The Penguin]] and provides the voices of several randomized inmates. It's not unheard of to hear NolanNorth {{b|adBoss}}erating his {{Mooks}} about how much they suck, only to hear Creator/NolanNorth reply "You heard Penguin! Let's move!"
** [[spoiler: Hush]] is also voiced by Creator/KevinConroy for obvious reasons.
* ViralMarketing: Starting in early October 2011, major Website/YouTube [[Creator/{{Polaris}} TheGameStation]] affiliates Creator/HuskyStarcraft, WebVideo/OMFGCata, [[Creator/TheCynicalBrit TotalHalibut]], and the LetsPlay/{{Yogscast}} left mysterious Riddler question marks in their daily videos: Each one linked to an unlisted Website/YouTube video part of a four-part audio involving Professor Strange and Two-Face that promoted the game and its Facebook page.
* WhatCouldHaveBeen
** In an interview, director Sefton Hill said they wanted to include a reference to the infamous Bat-Shark Repellent Spray from the Adam West series[[note]]Reportedly, when confronted by "Tiny" in the Iceberg Lounge, Batman would break out the repellent... then open it up to reveal a set of brass knuckles[[/note]], but ended up nixing it because they felt it was a LevelBreaker. There's still a subtle reference; if you get killed by the shark, one of the possible hints reminds you to remember Batman's shark repellent: a flurry of blows to drive it off.
** In one room, you can listen to the Riddler mutter about ways to take down Batman, and ponders taking Penguin's shark, only to say that there are "too many variables", and that Batman likely has some sort of "shark contingency".
** The plot itself borrows ideas from ''ComicBook/{{Knightfall}}'' and No Man's Land, among other famous Batman stories. A lot of the Joker/Batman dynamic is reminiscent of ''ComicBook/TheKillingJoke''.
* ''Arkham City'' was released the same day as the AnimatedAdaptation of ''Comicbook/BatmanYearOne'' and shares a lot of the same voice talent: Music/GreyDeLisle (Catwoman, Vicki Vale, Stacy Baker, Martha Wayne) is Barbara Eileen-Gordon and Vicki Vale, Creator/SteveBlum (Killer Croc and Sickle) is Stan, Creator/FredTatasciore (Bane, Solomon Grundy and Mr. Hammer) is Arnold Flass and Johnny Vitti, and Danny Jacobs (Victor Zsasz) is Flass's lawyer.
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