History YMMV / DCTheNewFrontier

** All three of Hal's brothers are prominently mentioned in a letter he writes home despite their obscurity outside of the main timeline.

* UnexpectedCharacter: Seeing the Blackhawks in a story set after UsefulNotes/WorldWarII and the Challengers of the Unknown at all (especially with Ace Morgan hovering just below main character status) is a bit surprising for some fans, but they show up to fight alongside the heroes nonetheless.

* CantUnHearIt: Jeremy Sisto as Batman. His soft yet imposing voice likely contributed to Christian Bale's bat-voice being seen as over the top, especially since the animated version of ''The New Frontier'' came out several months before ''Film/TheDarkKnight''.

** Iris West only has a few scenes, but fans adore her for her warmth and closeness with Barry and how she figures out his SecretIdentity.

** Original comic: [[GeniusLoci The Centre]] is the malevolent mind behind Dinosaur Island, a living land mass from the dawn of life on Earth whose size is dwarfed only by its own massive ego. Having created its own "paradise" to preserve the dinosaurs from extinction, the Centre has fed off and created tortured, agonized mutants from these "lesser things", garnering a reputation of fear and suffering from civilizations throughout the centuries. In response to mankind becoming more advanced and powerful, the Centre begins plotting to leave the planet to escape the danger they pose, sending out monstrous scouts to locate the materials it needs. The Centre's dark will is so powerful that its mere intentions begin causing wide-scale psychic havoc, driving countless people to acts of paranoid violence and encouraging the growth of cults that perform HumanSacrifice in the name of its greatness. After devastating [[ComicBook/WonderWoman Themyscira]], the Centre launches its ultimate attack with a massive, unending army of monstrous mutant dinosaurs, [[MindRape Mind Raping]] the massive assembly of heroes who have united to stop it from enacting its terrible [[KillAllHumans cleansing of "vermin"]] from the planet. [[ItsAllAboutMe Concerned only with its own glory]], the Centre is intent on spreading its rule to every corner of the solar system, purged of all life that would oppose it.
** Animated film: [[GeniusLoci The Centre]] is a malevolent EldritchAbomination and one of the first living beings to emerge from the Earth. Growing to fear the danger humanity presents to it in the wake of the atomic bomb, the Centre decides that [[KillAllHumans they must be "cleansed" from the planet]] and begins reaching out with its PsychicPowers, radicalizing numerous innocents into crazed murderers or doomsday cults who worship the Centre and sacrifice children to the monstrosity. Upon finally revealing itself to the world, the Centre unleashes unending hordes of mutated dinosaurs to bring about mass death and carnage, and after being exposed to Ray Palmer's fatal ShrinkRay, makes a mad charge to [[TakingYouWithMe take as many "lesser beings" out with it]] as possible in the ensuing explosion.

* MisaimedFandom: The cartoonish art style and hopeful ending are held up as a superior alternative to darker and adult-oriented comics that flooded the market from the '80s onwards. This is overlooking the fact that ''The New Frontier'' was intended to be a deconstruction of America's idealised image of the 1950s, showing bigotry, rape, distrust, ignorance, and senseless conformity as commonplace.

** ''Justice League: The New Frontier'': [[GeniusLoci The Centre]] is a malevolent EldritchAbomination and one of the first living beings to emerge from the Earth. Growing to fear the danger humanity presents to it in the wake of the atomic bomb, the Centre decides that [[KillAllHumans they must be "cleansed" from the planet]] and begins reaching out with its PsychicPowers, radicalizing numerous innocents into crazed murderers or doomsday cults who worship the Centre and sacrifice children to the monstrosity. Upon finally revealing itself to the world, the Centre unleashes unending hordes of mutated dinosaurs to bring about mass death and carnage, and after being exposed to Ray Palmer's fatal ShrinkRay, makes a mad charge to [[TakingYouWithMe take as many "lesser beings" out with it]] as possible in the ensuing explosion.

** The Challengers of the Unknown and the Losers being DemotedToExtra disappointed many fans due to their colorfulness and direct relevance to the bigger story arcs in the original comic.

* TheyChangedItNowItSucks: While John Henry's story is still meaningfully (albeit briefly) referenced in the film and would have been hard to include in a PG-13 film, many fans are mad it is reduced to a news story and a shot of his gravestone at the end instead of being shown in its entirety.