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)