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* Alan Burnett [[http://www.comicscontinuum.com/stories/0212/02/burnettindex.htm was working]] on an ''Aquaman'' spin-off for Kids' WB! that would have focused on the character's younger years, and made many different pitches to satisfy the mid-20s comic fans' demographic, the female audience, and kids.
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** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea[[note]] Most likely because there's a scene where the Martian Manhunter throws up on-screen and then [[Squick Elongated Man is later seen using a special machine to pick through the vomit]] [[/note]], but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Recap/StarTrekS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".

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** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea[[note]] Most likely because there's a scene where the Martian Manhunter throws up on-screen and then [[Squick [[{{Squick}} Elongated Man is later seen using a special machine to pick through the vomit]] [[/note]], but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Recap/StarTrekS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".
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** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Recap/StarTrekS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".

to:

** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, idea[[note]] Most likely because there's a scene where the Martian Manhunter throws up on-screen and then [[Squick Elongated Man is later seen using a special machine to pick through the vomit]] [[/note]], but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Recap/StarTrekS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".
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** Andrea Romano considered bringing Creator/VictorGarber on to [[IWantYouToMeetAnOldFriendOfMine reunite him with]] Creator/CarlLumby, but nothing came of it. Garber would eventually make his voice acting debut with WesternAnimation/GreenLanternFirstFlight.

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* As detailed in Watchtower Database's video about the subject, ''WesternAnimation/DarkwingDuck'' comic writer Aaron Sparrow wrote up a five-page pitch for a 22-issue comic continuation of the show. It even got Paul Dini's approval, but DC refused to greenlight it. This series would have included:

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* As detailed in Watchtower Database's video about the subject, ''WesternAnimation/DarkwingDuck'' comic writer Aaron Sparrow wrote up a five-page pitch for a 22-issue comic continuation of the show. [[ApprovalOfGod It even got Paul Dini's approval, approval]], but DC refused to greenlight it.it. Despite this, Sparrow is hopeful that ''Batman: The Adventures Continue'' will inspire DC to reconsider. This series would have included:



** Aaron Sparrow is hopeful that the Batman:The Adventures Continue Mini Series does well enough that DC Will Green light the pitch.
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* Creator/JonMcClenahan pitched to WB for his studio [=StarToons=] to work on the first season of ''Justice League'', much as the studio had worked on previous WB series throughout the '90s (''Tiny Toons'', ''Taz-Mania'', ''Animaniacs'', ''Histeria'', etc.). They were rejected in favor of Creator/KokoEnterprises / Dong Yang. It would've been interesting to see their animation style for the series.
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** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Recap/StarTrekTheOriginalSeriesS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".

to:

** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Recap/StarTrekTheOriginalSeriesS2E15TheTroubleWithTribbles "[[Recap/StarTrekS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".



** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue "Epilogue:]], [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'', but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.

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** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue "Epilogue:]], "Epilogue"]], [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , son]], was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'', but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.
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** The show had been pitched as far back in the '90s while ''Superman: The Animated Series'' was still in production, a number of concept pieces showing up online. One early idea would've had no Batman (as his solo series was still airing at the time), and included varied characters like Supergirl, Vixen, Lightray, Comicbook/BlackLightning, Nightshade (who would've sported a Comicbook/{{Psylocke}}-inspired redesign), the Question, Mister Miracle and Doctor Fate. Superman would've teamed up with two superheroes each episode before they all got together to assemble the Justice League in the series finale.

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** The show had been pitched as far back in the '90s TheNineties while ''Superman: The Animated Series'' ''WesternAnimation/SupermanTheAnimatedSeries'' was still in production, a number of concept pieces showing up online. One early idea would've had no Batman (as his solo series was still airing at the time), and included varied characters like Supergirl, Vixen, Lightray, Comicbook/BlackLightning, Nightshade (who would've sported a Comicbook/{{Psylocke}}-inspired redesign), the Question, Mister Miracle and Doctor Fate. Superman would've teamed up with two superheroes each episode before they all got together to assemble the Justice League in the series finale.



** At one point, Bruce Timm thought about giving costume redesigns to the founding members, but realized it was too [[TheyChangedItNowItSucks drastic]]. He would reuse these for the Justice Lord designs. [[https://jlurevisited.files.wordpress.com/2010/01/revised-costumes.jpg A Batman redesign and a masked John Stewart have surfaced]].

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** At one point, Bruce Timm Creator/BruceTimm thought about giving costume redesigns to the founding members, but realized it was too [[TheyChangedItNowItSucks drastic]]. He would reuse these for the Justice Lord designs. [[https://jlurevisited.files.wordpress.com/2010/01/revised-costumes.jpg A Batman redesign and a masked John Stewart have surfaced]].



** Creator/TimDaly was originally set to reprise the role of Superman from ''WesternAnimation/SupermanTheAnimatedSeries''. He did do some initial recordings, but he was not available due to his commitment to the TV remake of ''The Fugitive''.

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** Creator/TimDaly was originally set to reprise the role of Superman from ''WesternAnimation/SupermanTheAnimatedSeries''. He did do some initial recordings, but he was not available due to his commitment to the TV remake of ''The Fugitive''.''Series/TheFugitive''.



** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Series/StarTrekTheOriginalSeries The Trouble with Tribbles]]".

to:

** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Series/StarTrekTheOriginalSeries "[[Recap/StarTrekTheOriginalSeriesS2E15TheTroubleWithTribbles The Trouble with Tribbles]]".



** According to James Tucker (as addressed by Watchtower Database), the crew considered doing another twelve episode-long season of JLU, centered around time travel and/or travelling the galaxy, but it never came to be due to the show not being renewed. Dwayne [=McDuffie=] left a hook to a possible such season in "Alive!".

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** According to James Tucker (as addressed by Watchtower Database), the crew considered doing another twelve episode-long season of JLU, ''JLU'', centered around time travel and/or travelling the galaxy, but it never came to be due to the show not being renewed. Dwayne [=McDuffie=] left a hook to a possible such season in "Alive!".




* Creator/PaulDini was originally going to write "The Brave And The Bold Part 1", but since he injured his hand, Creator/DwayneMcDuffie wrote it [[https://mobile.twitter.com/DMcDuffiePage/status/1237441366596214785 instead.]]

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\n* Creator/PaulDini was originally going to write "The Brave And The Bold Part 1", but since he injured his hand, Creator/DwayneMcDuffie wrote it [[https://mobile.twitter.com/DMcDuffiePage/status/1237441366596214785 instead.]]]]
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*** [[WesternAnimation/BatmanTheAnimatedSeries Scarecrow and The Riddler]] were likewise intended to appear in Season 3 of ''Unlimited'' as part of the LegionOfDoom [[note]] due to them being part of the original line-up in ''Challenge Of The Super-Friends [[/note]], but the Bat-Embargo prevented this.
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** Aaron Sparrow is hopeful that the upcoming Batman:The Adventures Continue Mini Series does well enough that DC Will Green light it

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** Aaron Sparrow is hopeful that the upcoming Batman:The Adventures Continue Mini Series does well enough that DC Will Green light it
the pitch.
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Aaron Sparrow is hopeful that the upcoming Batman:The Adventures Continue Mini Series does well enough that DC Will Green light it

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** Aaron Sparrow is hopeful that the upcoming Batman:The Adventures Continue Mini Series does well enough that DC Will Green light it
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Aaron Sparrow is hopeful that the upcoming Batman:The Adventures Continue Mini Series does well enough that DC Will Green light it
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* Creator/PaulDini was originally going to write "The Brave And The Bold Part 1", but since he injured his hand, Creator/DwayneMcDuffie wrote it instead.

to:

* Creator/PaulDini was originally going to write "The Brave And The Bold Part 1", but since he injured his hand, Creator/DwayneMcDuffie wrote it [[https://mobile.twitter.com/DMcDuffiePage/status/1237441366596214785 instead.]]
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** Continuing with the show's ADayInTheLimelight format.

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** Continuing with the show's ADayInTheLimelight format.format.
* Creator/PaulDini was originally going to write "The Brave And The Bold Part 1", but since he injured his hand, Creator/DwayneMcDuffie wrote it instead.
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** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue "Epilogue:]], [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'', but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.

to:

** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue "Epilogue:]], [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'', but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.episode.
* As detailed in Watchtower Database's video about the subject, ''WesternAnimation/DarkwingDuck'' comic writer Aaron Sparrow wrote up a five-page pitch for a 22-issue comic continuation of the show. It even got Paul Dini's approval, but DC refused to greenlight it. This series would have included:
** Leading up to the Near-Apocalypse of '09 as well as incorporating the events of ''WesternAnimation/BatmanBeyondReturnOfTheJoker''.
** Characters from newer material like Jessica Cruz.
** Continuing with the show's ADayInTheLimelight format.
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** The Comicbook/JusticeSocietyOfAmerica was planned to appear in "Legends", which was an AffectionateParody of UsefulNotes/TheGoldenAgeOfComicBooks. This idea went so far as to have character designs and promotional stills produced, but they were forced to transform the Society into the Justice ''Guild'' of America by Creator/DCComics, who said they could not use the original characters. In the defense of DC Comics, they were trying to establish the Justice Society comic ongoing at the time as a serious story, which the affectionate parody nature of the episode would not have helped.

to:

** The Comicbook/JusticeSocietyOfAmerica was planned to appear in "Legends", which was an AffectionateParody of UsefulNotes/TheGoldenAgeOfComicBooks. This idea went so far as to have character designs and promotional stills produced, but they were forced to transform the Society into the Justice ''Guild'' of America by Creator/DCComics, who said they could not use the original characters. In the defense of DC Comics, they were trying to establish the Justice Society comic ongoing at the time as a serious story, which the affectionate parody nature of the episode would not have helped.helped with.
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*** The direct-to-DVD film ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'' is based on the film that was originally supposed to bridge the gap between ''Justice League'' and ''Unlimited.'' ''Justice League: Worlds Collide'' would have explained the origins of the expanded roster, the new Watchtower, and Wonder Woman's invisible jet and would have featured the Crime Syndicate as the primary villains. ''Worlds Collide'' was never produced as such, but people on the ''Crisis on Two Earths'' production team have said that the film stays within "95 percent" of the original script, and indeed it shows things like the second Watchtower under construction, the beginnings of an expanded Justice League, subtle evidence that [[spoiler: Hawkgirl recently]] left the League, and the origin of Wonder Woman's invisible jet (which made its first ''DCAU'' appearance two episodes into ''Unlimited'').

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*** The direct-to-DVD film ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'' is based on the film that was originally supposed to bridge the gap between ''Justice League'' and ''Unlimited.'' ''Justice League: Worlds Collide'' would have explained the origins of the expanded roster, the new Watchtower, and Wonder Woman's invisible jet and would have featured the Crime Syndicate as the primary villains. ''Worlds Collide'' was never produced as such, but people on the ''Crisis on Two Earths'' production team have said that the film stays within "95 percent" of the original script, and indeed it shows things like the second Watchtower under construction, the beginnings of an expanded Justice League, subtle evidence that [[spoiler: Hawkgirl [[spoiler:Hawkgirl recently]] left the League, and the origin of Wonder Woman's invisible jet (which made its first ''DCAU'' appearance two episodes into ''Unlimited'').



** According to the commentary track for ''WesternAnimation/SupermanDoomsday'', Creator/JamesMarsters (who voiced Lex Luthor in ''Doomsday'')was almost the voice of Comicbook/GreenArrow, but had to bow out at the last second.

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** According to the commentary track for ''WesternAnimation/SupermanDoomsday'', Creator/JamesMarsters (who voiced Lex Luthor in ''Doomsday'')was ''Doomsday'') was almost the voice of Comicbook/GreenArrow, but had to bow out at the last second.
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*** Related to ''Crisis on Two Earth'', Creator/VanessaMarshall, who voiced Wonder Woman there and ''WesternAnimation/JusticeLeagueTheFlashpointParadox'' was in the running to voice Wonder Woman for ''JL'' before Timm and co. opted for Creator/SusanEisenberg.

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*** Related to ''Crisis on Two Earth'', Creator/VanessaMarshall, who voiced Wonder Woman there and ''WesternAnimation/JusticeLeagueTheFlashpointParadox'' ''WesternAnimation/JusticeLeagueTheFlashpointParadox'', was in the running to voice Wonder Woman for ''JL'' before Timm and co. opted for Creator/SusanEisenberg.
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** According to the commentary track for ''WesternAnimation/SupermanDoomsday'', Creator/JamesMarsters was almost the voice of Comicbook/GreenArrow, but had to bow out at the last second.

to:

** According to the commentary track for ''WesternAnimation/SupermanDoomsday'', Creator/JamesMarsters was (who voiced Lex Luthor in ''Doomsday'')was almost the voice of Comicbook/GreenArrow, but had to bow out at the last second.



** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue Epilogue]] , [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'' , but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.

to:

** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue Epilogue]] , "Epilogue:]], [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'' , ''WesternAnimation/BatmanBeyond'', but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.
Is there an issue? Send a MessageReason:
None


** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Series/StarTrek The Trouble with Tribbles]]".

to:

** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Series/StarTrek "[[Series/StarTrekTheOriginalSeries The Trouble with Tribbles]]".

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[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/b7561472_a4b6_489a_8103_2a5b55a5cdf5.png]]
[[caption-width-right:350:Pre-Production Justice League]]



** [[https://dcanimated.com/WF/jl/backstage/modelsheets/misc1.jpg Another early concept piece]] showed a line-up consisting of Batman, Superman, Wonder Woman, the Flash, Green Lantern (either Hal Jordan, or the Jordan-esque Kyle Rayner seen in ''Superman: TAS''), and Aquaman (who would've sported his ''Superman: TAS'' design instead of his hook-handed one from the '90s). Hawkman, Hawkgirl, Green Arrow and Black Canary were apparently planned as well.

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** [[https://dcanimated.com/WF/jl/backstage/modelsheets/misc1.jpg Another early concept piece]] showed a line-up consisting As shown in the image above, the founding members of the Justice League was originally going to consist of Batman, Superman, Wonder Woman, the Flash, Green Lantern (either Hal Jordan, or the Jordan-esque Kyle Rayner seen in ''Superman: TAS''), and Aquaman (who would've sported his ''Superman: TAS'' design instead of his hook-handed one from the '90s). Hawkman, Hawkgirl, Green Arrow and Black Canary were apparently planned as well.
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* Numerous plots and ideas were dreamed up by the writers, and some even went to the scripting and storyboarding stage, before they had to be abandoned for one reason or another before the actual episodes were produced. These include, but are not limited to:
** The show had been pitched as far back in the '90s while ''Superman: The Animated Series'' was still in production, a number of concept pieces showing up online. One early idea would've had no Batman (as his solo series was still airing at the time), and included varied characters like Supergirl, Vixen, Lightray, Comicbook/BlackLightning, Nightshade (who would've sported a Comicbook/{{Psylocke}}-inspired redesign), the Question, Mister Miracle and Doctor Fate. Superman would've teamed up with two superheroes each episode before they all got together to assemble the Justice League in the series finale.
** [[https://dcanimated.com/WF/jl/backstage/modelsheets/misc1.jpg Another early concept piece]] showed a line-up consisting of Batman, Superman, Wonder Woman, the Flash, Green Lantern (either Hal Jordan, or the Jordan-esque Kyle Rayner seen in ''Superman: TAS''), and Aquaman (who would've sported his ''Superman: TAS'' design instead of his hook-handed one from the '90s). Hawkman, Hawkgirl, Green Arrow and Black Canary were apparently planned as well.
** And in another early concept piece, the line-up consisted of Superman, Wonder Woman, Flash, John Stewart's Green Lantern, Aquaman (in his ''Superman: TAS'' appearance still), and Orion.
** Additionally, a ''Teen Titans'' cartoon based off of the '60's team was also proposed in the '90's, with the line-up being the Flash and Kid Flash (presumably Barry Allen and Wally West, respectively), Aquaman and Aqualad, Donna Troy, Speedy, and Robin (presumably an older Tim Drake).
** The Comicbook/JusticeSocietyOfAmerica was planned to appear in "Legends", which was an AffectionateParody of UsefulNotes/TheGoldenAgeOfComicBooks. This idea went so far as to have character designs and promotional stills produced, but they were forced to transform the Society into the Justice ''Guild'' of America by Creator/DCComics, who said they could not use the original characters. In the defense of DC Comics, they were trying to establish the Justice Society comic ongoing at the time as a serious story, which the affectionate parody nature of the episode would not have helped.
** The Crime Syndicate, a [[CaptainErsatz not]]-[[{{Expy}} quite]]-EvilTwin version of the League from a [[MirrorUniverse parallel world]], was scheduled to appear in two separate stories, but both were abandoned for different reasons.
*** The first was "A Better World," an episode where the Syndicate was replaced by the Justice Lords, a more direct mirror image of the League which featured [[EvilTwin alternate versions of the same characters]], rather than villains who were merely similar in theme and power.
*** The direct-to-DVD film ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'' is based on the film that was originally supposed to bridge the gap between ''Justice League'' and ''Unlimited.'' ''Justice League: Worlds Collide'' would have explained the origins of the expanded roster, the new Watchtower, and Wonder Woman's invisible jet and would have featured the Crime Syndicate as the primary villains. ''Worlds Collide'' was never produced as such, but people on the ''Crisis on Two Earths'' production team have said that the film stays within "95 percent" of the original script, and indeed it shows things like the second Watchtower under construction, the beginnings of an expanded Justice League, subtle evidence that [[spoiler: Hawkgirl recently]] left the League, and the origin of Wonder Woman's invisible jet (which made its first ''DCAU'' appearance two episodes into ''Unlimited'').
*** Related to ''Crisis on Two Earth'', Creator/VanessaMarshall, who voiced Wonder Woman there and ''WesternAnimation/JusticeLeagueTheFlashpointParadox'' was in the running to voice Wonder Woman for ''JL'' before Timm and co. opted for Creator/SusanEisenberg.
** The ComicBook/BirdsOfPrey would have starred in an episode of ''Justice League Unlimited''. In a [[BroadStrokes semi-retelling of the origin of Oracle and the team]] there was originally a plan for Comicbook/{{Batgirl}} to be hospitalized in an episode and, unable to finish the mission she was on when she was injured, she would contact Huntress and Black Canary to help her finish the job while supervising them over their radios. The "Bat-Embargo," which was a moratorium on using certain Batman-related characters after the premier of ''WesternAnimation/TheBatman'' and the production of ''Film/BatmanBegins'', meant that Batgirl had to be written out of the episode and the story was re-written and expanded into "Double Date". The episode still featured Huntress and Black Canary, but also included their "dates" Comicbook/TheQuestion and Comicbook/GreenArrow.
** At one point, Bruce Timm thought about giving costume redesigns to the founding members, but realized it was too [[TheyChangedItNowItSucks drastic]]. He would reuse these for the Justice Lord designs. [[https://jlurevisited.files.wordpress.com/2010/01/revised-costumes.jpg A Batman redesign and a masked John Stewart have surfaced]].
** The commentary for "The Return" reveals that, when "Starcrossed" was scripted, the writers did not know where Shayera had gone after leaving the League. One theory was that she had become the resident guardian angel of a small South American village, and another was that one of the victim planets of the Thanagarians had found her seeking revenge (this story was later used in the ''Unlimited'' episode "Hunter's Moon"). Eventually they decided that she had sought sanctuary with ComicBook/DoctorFate, and this led to the double meaning of the title "The Return".
** Lastly, a minor cameo instead of a plot-important appearance, the writers originally wanted a Joker cameo in "This Little Piggy" for a brief moment of comic relief. After Diana [[spoiler:had been turned into a pig]], Batman would be walking down the street with her and would pass the Joker preparing to commit a crime with his gang. The Joker, in the middle of preparing a heist and laying out his convoluted plan to deal with Batman, would see Batman [[spoiler:holding and consoling a pig]] and would stare at it in DullSurprise, then throw his hands in the air and abandon the entire scheme because he couldn't possibly top that. Sadly, this scene (which might very well have been the single greatest scene ''ever animated''), had to be dropped from the episode for a variety of reasons, including time and pacing problems.
** According to the commentary track for ''WesternAnimation/SupermanDoomsday'', Creator/JamesMarsters was almost the voice of Comicbook/GreenArrow, but had to bow out at the last second.
** There were plans to make a crossover with ''WesternAnimation/TeenTitans'', but the idea was dropped because the writers couldn't come up with a good story that would fit both shows' different style.
** [[WesternAnimation/SupermanTheAnimatedSeries Mxyzptlk]] was set to appear, but the production team couldn't find a good way to fit him into the story.
** In an interview from 2001, Bruce Timm stated that the creative team considered the "In Brightest Day" episode of ''Superman: The Animated Series'' to be CanonDiscontinuity, as its use of Kyle Rayner conflicted with John Stewart being Earth's Green Lantern. They eventually found a way to reconcile the situation with Kyle in the second season by having Katma Tui mention that he'd been sent to Oa for training, thus explaining his absence.
** Orm was supposed to return as Ocean Master later in the series, but it never happened.
** [[http://www.worldsfinestonline.com/WF/jl/backstage/testfootage/ When the show was originally pitched]] to Creator/KidsWB, the Flash was swapped out for three {{Kid Sidekick}}s: Robin, Impulse, and a [[GenderFlip gender-flipped]] Cyborg.
** Creator/TimDaly was originally set to reprise the role of Superman from ''WesternAnimation/SupermanTheAnimatedSeries''. He did do some initial recordings, but he was not available due to his commitment to the TV remake of ''The Fugitive''.
** [[ComicBook/{{Shazam}} Captain Marvel]] was originally supposed to appear in ''Hereafter'' as Superman's replacement, but they went with Lobo instead.
** The whole Amazo and Grundy thing was supposed to be a BrickJoke in the last episode but they forgot. They were going to include a gag in the finale showing Amazo sitting on an asteroid somewhere, wondering whether or not it was safe to return (even though his omniscience should've told him so).
** While writing the Cadmus arc they seriously considered having Batman defect from the Justice League and join Cadmus after being convinced that Cadmus was right about his god like super-friends, but they nixed the idea since they felt it would have required making the League look and act like a bunch of jerks or make Batman look and act like a jerk (and he had already crossed the {{Jerkass}} line before in season 2).
*** That basically what happens in Marvel Comics' ''ComicBook/SquadronSupreme'' mini-series from the 1980s featuring an alternate reality CaptainErsatz version of the JLA. The Squadron decide to create a Utopian society on their world but at the cost of individual liberty. One of their members, Nighthawk (their world's version of Batman) forms his own team to stop them. As a result both sides do end up looking like jerks.
** There was going to be more focus on Creator/MichaelRosenbaum voicing Luthor as the Flash in "[[Recap/JusticeLeagueUnlimitedS3E8TheGreatBrainRobbery The Great Brain Robbery]]", but [[RealLifeWritesThePlot the crew found Clancy Brown's performance of the Flash as Luthor just too funny]].
** Stan Berkowitz and Dwayne [=McDuffie=] wrote a comedy-heavy episode called "Misfortune Cookies" based heavily on the ''Justice League International'' comics. The story centered on Martian Manhunter's addiction to Oreos...er, [[WritingAroundTrademarks Chocos]] almost ruining a peace negotiation between two warring alien races, which forces Elongated Man to play the mediator instead. The executives vetoed the idea, but in early 2015, J.M. Dematteis [[http://www.jmdematteis.com/2015/01/jlu-lost-episode.html?m=1 posted]] a summary version of the concept on his website, saying it could have been ''JLU''[='s=] equivalent to "[[Series/StarTrek The Trouble with Tribbles]]".
** The Question almost got his own {{Spinoff}}.
** Creator/GailSimone said that if she was allowed to write another episode besides "Double Date", there would have been an episode with the Queen of Fables as the villain.
** "The Greatest Story Never Told" was originally going to star Firestorm before it was changed to Booster Gold.
** Superman/Clark was going to reveal his identity to Lois at the end of "Divided We Fall", but ExecutiveMeddling put a stop to that.
** Word is that at some point in JLU Season 3, Luthor would've succeeded at reviving Brainiac, in addition to the Key being involved in some way. For whatever reason, this wasn't to be.
** According to James Tucker (as addressed by Watchtower Database), the crew considered doing another twelve episode-long season of JLU, centered around time travel and/or travelling the galaxy, but it never came to be due to the show not being renewed. Dwayne [=McDuffie=] left a hook to a possible such season in "Alive!".
** According to James Tucker, they also considered doing a whole season taking place in the ''WesternAnimation/BatmanBeyond'' era.
** According to Dwayne [=McDuffie=] on his now defunct website ([[https://www.youtube.com/watch?v=pBbxZIMYNWE as seen in this Watchtower Database video]]), the writers seriously considered an episode where Hal appeared, but nothing came of it.
** [[https://mobile.twitter.com/Paul_Dini/status/1142149431111720960 According to]] Creator/PaulDini, he mentioned that the twist for [[Recap/JusticeLeagueUnlimitedS2E13Epilogue Epilogue]] , [[spoiler: where Terry is revealed to be Bruce Wayne's son]] , was something that they tried incorporating into ''WesternAnimation/BatmanBeyond'' , but the show was cancelled before they could explore it in more detail. It was eventually incorporated here, though he wasn't involved in the episode.

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