* HeyItsThatVoice:
** James Woods ([[Disney/{{Hercules}} Hades]]) is Owlman.
** GinaTorres is Superwoman.
** The League itself is full of this trope. [[Series/{{NCIS}} Gibbs]] is Superman, [[WesternAnimation/DannyPhantom Johnny 13]] is Batman, Creator/VanessaMarshall is Wonder Woman, Creator/JoshKeaton is the Flash and Aquaman, NolanNorth is Green Lantern and [[EvilCounterpart Power Ring]] (making him the second person (the first being RyanReynolds) to be tied to both Hal Jordan and Wade Wilson/Deadpool), and [[Series/AmericanDreams Henry Walker]][=/=][[WesternAnimation/AvengersEarthsMightiestHeroes Kang the Conqueror]] is Martian Manhunter.
** Good SelfDemonstrating/LexLuthor is [[Series/LawAndOrder Mike]] [[LawAndOrderCriminalIntent Logan]].
** Creator/BruceTimm is Uncle Super.
** Voice director Creator/AndreaRomano is the Watchtower computer.
** Creator/CarlosAlazraqui is Breakdance.
** [[Film/XMen1 Senator Kelly]] is President Slade Wilson.
** Both Black Lightning and Firestorm are [[ComicStrip/TheBoondocks Tom Dubois]].
** Creator/BrianBloom is Ultraman.
** Both Model Citizen and Black Canary are [[{{Sliders}} Maggie Beckett]].
** [[KingdomHearts Xigbar]] is Johnny Quick and Jester.
** [[WesternAnimation/TransformersPrime Skyquake]] is Mr. Action.
* NamesTheSame: Superman's EvilCounterpart has nothing to do with [[Franchise/UltraSeries those giant silver guys]] who save Tokyo from {{Kaiju}} attacks.
* PlayingAgainstType: Looking at their later roles, the idea of Brian Bloom playing a villain and Jonathan Adams playing a hero seems far fetched.
* WhatCouldHaveBeen
** It was originally planned as a ''WesternAnimation/JusticeLeagueUnlimited'' film, titled ''[[http://dcanimated.wikia.com/wiki/Justice_League:_Worlds_Collide Worlds Collide]]''. It's still really obvious.
** The casting of the movie contains two, according to interviews with Creator/BruceTimm. According to one interview, James Woods was set to be in the DCAU version before it got pulled, though it's unclear who he was going to play (Timm said he'd still been Owlman, but Andrea Romano, DwayneMcDuffie and Woods himself believe he was going to play the good Luthor). According to another, Creator/VanessaMarshall, who voiced Wonder Woman for the film, was in the running of the role in ''WesternAnimation/JusticeLeague'' and came close, but the producers picked Creator/SusanEisenberg instead for the series.

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