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Ice is shown flying into battle against Major Force, despite the fact she has no power of unassisted flight in either the comics or in previous episodes of the series.
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When Batman wakes up in the infirmary, Martian Manhunter is standing next to candles. The Martian Manhunter's weakness is fire.
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Trivia: Besides the Riddler and Solomon Grundy, other villains shown fighting the various Batmen are Hugo Strange, Flamingo and the Club of Villains (El Sombero, King Kraken, Pierrot Lunaire, Scorpiana, Swagman, Charlie Caligula), Professor Pyg, and Mister Toad.
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Trivia: Among those at the funeral of Bruce and Selena Wayne are Steve Trevor, Diana Prince (Wonder Woman), Commissioner Gordon, Barbara Gordon (Batgirl), Alfred Pennyworth, Damian, Dick Grayson (Batman/Nightwing), Clark Kent (Superman), Lois Lane, Dinah Drake (Black Canary), Oliver Queen (Green Arrow), Jaime Reyes (Blue Beetle) and an unknown.
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Trivia: Among those attending the wedding of Bruce and Selena are Clark Kent (Superman), Oliver Queen (Green Arrow), and Jaime Reyes (Blue Beetle).
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Trivia: Among Faceless Hunter's trophies are a Thanagarian hawkman, Superman's enemy Brainiac (in his Silver Age costume), a Apokolips parademon, and a partially disassembled Emerald Eye of Ekron.
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When Batman's team approaches the transmitter in Star City, Mister Miracle, Blue Beetle, Red of the Challengers of the Unknown, and several Green Lanterns are waiting for them, hovering in mid-air. However, Red has no ability to fly and there is no indication that the Starro drones can or would give new superpowers to the heroes they possess.
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Trivia: The adult Bruce Wayne's face is seen for the first time in the series.
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Heroes Taken Over By the Starros: Blue Beetle (Jaime Reyes), Green Arrow & Speedy, Flash (Jay Garrick), Plastic Man, OMAC, Black Canary, Hawk and Dove, Bronze Tiger, Huntress, Wildcat, Doctor Mid-Nite, Hourman, Mister Miracle & Big Barda, the Outsiders (Black Lightning, Katana, and Metamorpho), Fire, Hawkman (Carter Hall), and Green Lantern (Hal Jordan).
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When Jason and Ronnie are fused after the explosion, they're seen in ragged clothes before Batman provides them with a costume. When Firestorm is separated back to the twosome, they're back with their regular clothes intact, as well as Jason having his glasses and backpack and the Firestorm costume is missing before the guys decide to fuse together again.
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Trivia: Among the famous DC landmarks seen during Aquaman's travels are: Star City, Smallville, Blue Valley, Central City, Hub City, Fawcett City, Ivy Town, New Carthage, Opal City, and Blüdhaven.
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Trivia: Footage of Jonah Hex from
"Return of the Fearsome Fangs" appears on the movie screen during Plastic Man's flashback to people that might hate him.
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When Mongul tells the assembled heroes and villains that the winner of the race will get to rule Earth, Gentleman Ghost's clothes are colored black.
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Heroes/villain appearing without dialogue: Question, Clock King, Gorilla Grodd, Fire, Blue Beetle, Green Lantern (Hal Jordan), Flash (Jay Garrick), Black Lightning, Black Canary, Green Arrow and Red Tornado.
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During the opening, Batman and Green Arrow are tied to a pillar. Their ropes change positions repeatedly.
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During the opening, Catwoman slashes Batman's chest with four claws. At first, there are four slashes, but in later shots there are only three slashes. Additionally, the three slashes change from shot to shot.
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While Batman and Black Canary are tied up in Music Meister's trap we see the names of other superheroes and villains on the wall behind them: Inferior Five, Fearsome Five, The Metal Men, Injustice Gang, The Great Ten, Trenchcoat Brigade, Tornado Twins, Boy Commandos, Female Furies, Challengers of the Unknown, Monster Society of Evil
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Other characters appearing without dialogue: enemies from the 60s Batman series (Black Widow, Bookworm, False-Face, King Tut, Louie the Lilac, Ma Parker, Mad Hatter, Egghead, Shane), Psycho-Pirate, Calendar Man, Tweedledum & Tweedledee, Doctor Polaris, Mr. Freeze, Scarecrow, Two-Face, Joker, Felix Faust, Crazy Quilt, Cavalier, Babyface, Fun Haus, Shark, Guy Gardner, the Outsiders (Black Lightning, Katana, Metamorpho), Catman, Bane, Killer Moth, Booster Gold, Hawk & Dove, Riddler, the Terrible Trio, Bronze Tiger, Plastic Man, Atom, Brain, Robin, Gentleman Ghost, Major Disaster, Catwoman, Mrs. Manface, Copperhead, OMAC, Elongated Man, Fire, Jarvis Kord, Tiger Shark, Polka-Dot Man, Question, Kr'ull the Eternal (and his henchmen), Speedy, Wildcat, Huntress, Solomon Grundy, Big Barda, Penguin, and Zebra-Man.
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In several shots, the prisoners don't appear in the same tubes during the battle in the time tunnel chamber. For instance, Batman is against a pillar and Mongul misses him with a punch, and the "space pirate" from the arena is seen even with Mongul. When Jonah jumps and fires his gun, the same alien is now even with Jonah, much closer to the time tunnel. When Jonah shoots Mongul, a gray-skinned alien with a movies Alien-type head can be seen to his right. Mongul throws a piece of floor at Jonah and the same alien is seen to Jonah Hex's left. And when Batman is thrown against a tube at floor level, a short bow-legged alien is seen to his right, but a few scene cuts later as Mongul calls them unworthy, the same alien is on the second tier of tubes.
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Other villains appearing without dialogue: Stompa, Zebra-Man