Other mistake: Fireworks use heated metals to produce the various colors seen when they explode - Iron, Nickel, Cryolite, magnesium and copper filings. Flying a jet engine through exploding fireworks would cause serious damage to the engine.
Other mistake: Barbara in her rage against the dangerous drunk throws him against a parked truck. The impact is so strong it deforms the truck bed. By a LOT, and yet the guy is able to get up (on his knees at least). That impact should have pulverized his ribs, he's not a superhero. (01:15:25)
Other mistake: The contest begins with 9 Amazons, but there are only 6 horses on the beach. One could think then that maybe it's an elimination game and it's done on purpose to weed out the slowpokes who finished last the first part of the race. Then again...they race to pick up their bow and arrows from seven racks. (00:03:20)
Other mistake: It is a comic book world and all that, but the plot device used here references the real world "particle beam technology" from the Strategic Defense Initiative "Star Wars" program. If the US had, in 1984 even, the capacity to generate enough particles and use them that way, it's hardly possible that the rest of the DCU could have evolved to be like our normal world as shown in the following movies; the quantity of energy alone to irradiate the whole planet at once is enormous. This technology also makes computers receive a TV signal, evidently, since we see normal desk computers and monitors broadcast his speech. Let's not forget that this apparatus was built, in a working state and ready to be used even before any crazy magic was involved. (01:46:00)
Other mistake: In the final credits, the song "Cars (Music Video) " has its iconic singer Gary Numan misspelled as "Gary Newman." Funnily enough, exactly facing this mistake (left column of the same frame) there's also the song "M.E." written by Numan, and his last name there is spelled appropriately. (02:30:10)
Other mistake: You'd think that a road in the middle of a desert wasteland in Egypt would be boring, but the day when a giant wall appears in the country and tanks blow up at hearing distance (especially, again, being in the middle of nowhere), kids can't be bothered and just keep on playing football in the middle of said road. A missile is fired literally seconds before and explodes right there, and yet they are still oblivious and play ball. Same thing for the adults; people casually walk around and look when WWIII has been happening meters away from them. (01:25:40)
Other mistake: In a classic physics mistake that superhero comics already dealt with in the early 70s, Wonder Woman to 'save' the kids pounces them at the speed of (literally) a rocket, faster than a car, and even falls with them in an uncontrolled tumble on the asphalt. Those kids should have been reduced to a pulp. (01:25:40)
Other mistake: Steve is amazed by the mere sight of modern planes, and by the fact he just learns that there are planes that can fly from the US to Cairo directly (unlike the plane he steals later, incidentally) and in a certain time (which he somehow surmises, it is not displayed on the ticket he is looking at), showing that he absolutely has no prior knowledge of modern aviation. Even for 80s camp, the concept that a WW1 pilot who never even knew of jet planes sits on the cockpit and figures out how it all works in a minute by flipping switches...is totally bogus. (01:08:00)
Other mistake: Flying the jet plane, Steve is surprised by the lights in the sky and needs Diana to explain to him that it's fireworks and it's the 4th of July. Fireworks are something that has existed for centuries, and Steve himself was the one who found the plane ticket for the 4th commenting "If this date is right." (01:11:30)
Other mistake: Since Max renounced his wish, it is implied and shown that he had to give up also all the benefits he gained from his role, still he uses the Marine One presidential heli to get back to land. There's also no way he'd know where his son was, considering that in the lasso's vision he was running on a highway, and he happens to find him at the White House lawn. (02:20:00)
Other mistake: In the first Wonder Woman movie, Queen Hippolyta, Wonder Woman's mother, was adamant that Diana was never to be trained as a warrior, fearing the fact that making her stronger would draw Ares to her (or vice versa), and argues with her sister who was training her in secret when she finds out; this incident happens when Diana is an adolescent. In this movie, a much younger, still child-like Diana takes part (and nearly wins) a contest between the fiercest athletes, involving horseback archery. The Queen should be freaking out and look for whoever put a weapon in her kid's hand, and instead she is perfectly happy, obviously cheering for her and at the end she even gives her a pep talk telling her to look up to...the great warrior Asteria.
Other mistake: To win the race, the 9 Amazons need to shoot color coded targets from a wheel that has 7 possible 'arrows'. That seems already rather impossible, since the colors are unique to the contestants. Moreover, Diana's color, blue, is consistently on top in the 12 o'clock position, but their rivals' insignia in yellow and red change position, adding an unfair advantage to the heroine, or to be precise, they are at 10 and 2 the first time, 4 and 7 the rest of the time. (00:05:55)
Other mistake: Max broadcasts his speech in English, but everyone in the world understands him just fine. The movie never established that Max can be understood by anyone at the same time, and we hear the broadcast in English (if the movie wanted to convey that to other people he sounds in his own language, they would have showed that). (02:02:40)
Other mistake: Wonder Woman pushes the cute kid to safety onto a big FAO Schwarz plush. She then lassos the two baddies and springs to the opposite side of the mall hall to capture the last two, then turns to her left and exchanges knowing looks and complicit winks with that kid that is still sunken into the plush toy. They should be nowhere near close enough for her to do that. (00:16:00 - 00:16:40)