Revealing mistake: After Wonder Woman kills the final terrorist with a huge blast, debris rains down on the police below. Not only are none of the officers injured, the debris doesn't cause any damage to the vehicles whatsoever. There are no broken windows, broken windshields, broken light bars, or any dents and scratches despite massive chunks of the building falling all over the vehicles.
Revealing mistake: One of the amazons (apparently called Epione) is standing to the right of the chamber doorway and shoots arrows protecting the queen. When Hippolyta runs towards the wall to do a fancy move after fetching the Mother box, you can see Epione being tossed to the wall by the parademon bolt a moment before the CGI bolt reaches her. (00:29:15)
Revealing mistake: When the military security checks Flash's phony badge, the name on the personnel list to the right does not match the fake identity; Barry's false identity is "Rowe, Wesley", but in the list the name "Band, Ryan" is highlighted. This mistake was not present in the theatrical 'Whedon' cut where the name was altered to match. (02:27:05)
Chosen answer: In the comics Steppenwolf traditionally has a very human appearance. He is tall and muscular with tan skin, black hair, and a moustache and goatee. Some of Steppenwolf's animated appearances show him essentially the same but with grayish/green skin, giving him an appearance somewhat similar to the 2017 Justice League version. According to Zack Snyder, the version of Steppenwolf in the 2021 version of Justice League was purposefully designed way back during the filming of Batman vs. Superman as not just a threat to the Justice League, but to the entire planet, hence the monstrous appearance. Warner Brothers made Snyder tone down the design because, according to him, they felt it was too frightening and intense for a PG-13 film. The version of Steppenwolf in Snyder's film has a very alien appearance, with the character's signature horns being part of his physiology rather than a part of his battle helmet, an immensely muscled physique, and covered in spiked armor.
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