Continuity mistake: After the Major Disaster fight, the scene changes to Carrol flipping through a photo album. She is holding the book and turning pages with her left hand, and has her head propped up on her right hand. It cuts to an over the shoulder view and she reaches down with her right hand to turn a page. It cuts back to in front of her and suddenly her right hand is propping up her head again.
Continuity mistake: Green Lantern knocks out Major Disaster by smacking ice back at him. Major Disaster flops across the road and lies nest to the double yellow lines with his head going down the right of the road and his feet to the left. But then when Green Lantern and Batman approach his body, he is suddenly lying with his feet pointed towards the double yellow line.
Continuity mistake: The car Batman hides behind during the fight with Major Disaster is a burgundy color. But a little bit later when Green Lantern swats ice back at Major Disaster, the same car is seen by the center of the road, and is suddenly blue.
Continuity mistake: Major Disaster gets a good hit on Green Lantern and smashes him into a wall with some large chunks of ice. Green Lantern leaves a hole in the wall, but none of the wall falls out and there are ice chunks all around him. But when Batman swoops in to get him out of the way, there is no ice there anymore, and suddenly there are several chunks of wall around Green Lantern.
Continuity mistake: Batman hides behind a car while talking to Green Lantern who's fighting with Major Disaster. His head is right by the car door handle. It cuts to a wide shot as he gets up to dodge an attack and the car's handle disappears.
Continuity mistake: After Hal crashes the Batmobile/jet, Carrol and the reporter take off in a fast car towards the crash site. They are moving at racing speeds and there is no other vehicles around them as they zoom away from camera. But then they get to the crash site and suddenly there are two fire trucks driving beside her car and keeping up. They were not there a moment before, and a fire truck could not have caught up to a sports car going that speed.
Continuity mistake: Batman throws some Baterangs at the bags of money Tattooed Man is holding, and rips them apart. Pieces of sack and money fall everywhere. Tattooed Man does not move from that spot before he sends a tattoo axe attack at Batman. In that shot, there is no money or ripped sack on the ground around him or visible anywhere.
Continuity mistake: When the two police cars drive up to Tattooed Man and stop, there is the yellow center line of the road between them. But when Tattooed Man sends a tattoo fist at them and they get smashed out of the way, the yellow line has vanished.
Continuity mistake: Tattooed Man leaves the bank with two bags of money. He is shown standing on a concrete titled surface like a decorative sidewalk. He turns when he hears some police cars approaching. The shot cuts to a view of the police cars from between Tattooed Man's legs, and suddenly he is standing in the middle of the street on asphalt.
Plot hole: Van Gunther has the two rockets aimed at the Geneva Convention. They launch with Steve attached to one of them. Wonder Woman chases in her invisible jet and shoots down the other rocket. She then gets out and uses her crown like a boomerang to break the chains holding Steve to the second rocket and rescues him off it. She or her crown never touch the rocket, but it crashes into a mountain. She did nothing to it to disrupt its course towards the Geneva Arms Conference. There was nothing to make it crash or hit prematurely, and the sudden weight change of Steve falling off would not have been enough to cause it.
Continuity mistake: After landing, Wonder Woman begins blocking a spray of bullets with her wrist guards and says hi to Batman, then turns her head and asks if Steve is okay. The star on her tiara is visibly darker right then. But in the middle of the shot without a cut, the star suddenly becomes brighter.
Factual error: During the final fight in Lex's lair, Joker gives Batman a good smack with his large hammer. As is common in this show, when a good hit is delivered, a freeze frame is show with the figures moving in slow motion with a stylized colorful backdrop to add to the drama dynamics. But as Joker delivers this hit and this stylized shot is shown, the show cuts to some inmates in a prison cell watching the fight on TV. The same stylized shot is shown on their TV, where it would be show like that there, only to us. They would have just seen Joker hit Batman with the hammer and him fly off in real time with no stylized back drop or slow mo.
Continuity mistake: As the camera comes out so Lex can broadcast the death of the heroes to the world and beyond, they are standing with Cheetah on Lex's right, and Joker to his left. But then when the shot shows a large screen where the broadcast is happening, Cheetah walks in on his left and Joker is now on his right.
Continuity mistake: After teleporting the villains and heroes to Lex's lair, Lex has his hands gripping a control panel podium in front of him. As Joker begins to speak, it cuts to a closer angle and suddenly Lex's arms change position and his hands are gripping the podium differently.
Plot hole: Just after Lex teleports into the Bat Cave, he marvels over how their tracking devices worked perfectly. However, they didn't have the plan to switch up nemeses until after they had their butts handed to them and retreated back to the Lex's lair. They never had the chance to put any tracers on the heroes, nor did they even have the idea to beforehand.
Continuity mistake: Lex blasts Superman with a pulse from his chest in the power armor, sending Superman backwards. He lands on the sidewalk next to a building. The shot cuts to Lex firing a pulse from his hand, then back to Superman. Suddenly, Superman is getting up but in the street not the sidewalk, and the sidewalk is suddenly a lot narrower.
Continuity mistake: When the kid in the stands gives Batman a bat that is not hit by magic, Lex says it doesn't matter. Between the far shot and the close up on his hand, his fingers slightly change position on the baseball. The style of his glove also changes. From having the base hanging off his forearm, to being form fitting in the close up.
Continuity mistake: Lex teleports Superman, Batman, and Wonder Woman to his lair and begins broadcasting to the world. Cheetah raises both arms in a wide shot and brags about how the world will see now, and lowers her left arm while keeping her right one up. Then it cuts to a closer view and both arms are up again, and she again lowers her left arm.
Continuity mistake: To protect Bruce Wayne's identity from Lex, Alfred dons the Bat Suit and fights Lex to give Bruce enough time to get another bat suit on. Lex uses a laser to cut through a catwalk that Alfred is walking on and he falls. He is in front of Lex but at a distance. The real Batman walks up to Alfred and thanks him, then charges Lex. Suddenly he is behind Lex when doing this and Lex has to turn around to defend himself, despite just being focused where Alfred was.
Continuity mistake: Just before Lex Luthor infiltrates the Batcave, Bruce Wayne and Alfred are at his supercomputer. Bruce's chair is right in front of the center of the computer. But when he turns to see Lex, the chair is suddenly off way to the left of the computer.
Continuity mistake: Cheetah smashes Superman into a bronze colored statue that has a large sphere of the same color held up by it. He falls and it falls on top of him, breaking into little pieces. The pieces are still the bronze brown color. When she picks him up and throws him at the miniature city of Kandor, the pieces are suddenly gray.
Continuity mistake: Cheetah slams Superman into what looks like a computer mainframe. He stumbles forward and falls to his knees. The next shot as Cheetah kicks him, he is suddenly standing again and in the middle of the room, away from the mainframe.
Plot hole: At the Amazonian contest, the stadium is full packed with people spectating the event. When Joker attacks their queen and Wonder Woman, they do nothing. No panic, no revolt, no riot, not even a sound. Yet Joker just knocked out their queen, turned the other Amazonian warriors to his side with Joker Gas, and took out Wonder Woman, all in front of them.
Continuity mistake: After revealing himself to Wonder Woman, Joker rips of his cross-dress disguise. The two halves land on the ground on both sides of him. But then when he subdues Wonder Woman with his Joker gas, he is standing in the same spot, approximately, and the torn clothing is now gone.
Continuity mistake: When Joker zaps Wonder Woman and her mother, they are both standing in front of their thrones and fall forwards. But when Wonder Woman stands back up, her mother, still unconscious, is suddenly off to the side and behind the thrones.
Continuity mistake: After Joker subdues the other Amazonians, he is disguised as a female warrior and talks to Wonder Woman and her mother. There are no Amazonians knocked out in front of Joker and one is beside him with her head behind him. But in the reverse angle, that one has vanished and there is suddenly another Amazonian adjacent in front of Joker with her body in a different position.
Continuity mistake: Back at their kingdom, Wonder Woman and her mom are sitting and talking as they watch the fighting before them. The mother turns her head towards Wonder Woman in a close up and says "Oh please. It's just one little contest." It then changes to a wide shot again and suddenly her mom is looking straight forward.
Plot hole: After Superman thwarts Lex's plan and knocks the Kryptonite into the sewers, Lex yells in frustration, splits his power suit off and flies away on a jet pack. Superman just lets him go. Wouldn't Superman chase him and catch him, especially seeing as how weak Lex would be like that?
Continuity mistake: At the diner when Superman, Batman, and Wonder Woman are discussing the Superhero Memorial Time Capsule, Wonder Woman's cup is next to her arm. Then a few shots later, without her touching it, the cup is suddenly much closer to the edge of the table.
Continuity mistake: After the opening title sequence, it shows Batman and a reporter tied to a giant bullseye target. She and Batman are equal distance from the center bullseye, and it is about waist level on her. It then cuts to a perspective from Batman's angle, and suddenly the reporter is much closer to the center, and the bullseye is level with her calves. Then when the giant pie is flying towards them, the center bullseye is level with her and Batman's feet.
Continuity mistake: Right at the beginning, the camera closes in on a baseball field. It shows several people standing and walking out in the field and just two standing up by home plate. The view changes to behind home plate and suddenly there are several superheroes sitting and stretching there, and the rest of the field is empty. Then after a shot of Jimmy Olson in the commentator stand, it shows a high view of the field again and the people have all changed again.
Revealing mistake: When Miss Taylor transforms into Star Sapphire and is about to kidnap Carrol, the wind blows heavily and begins turning the pages of the photo album on Carrol's desk. The first few pages to turn show the exact same pictures over and over again.