* AuthorsSavingThrow: Dr. Light used to be a serious threat capable of taking on the Justice League, but somewhere along the line became a comical punching bag of the Teen Titans. This mini explains why that change took place and restores him to his original characterization.
* BrokenBase:
** The Deathstroke vs. Justice League fight. For all that is holy, '''[[InternetBackdraft never]]''' bring it up in any [[PopularityPower Versus Discussion]], less you want the thread to be completely derailed.
** Notably, the book occupies many extremes simultaneously. [[spoiler: Jean Loring claims not to have wanted Sue's death, but brought along a flamethrower anyway, [[SarcasmMode perhaps as a baby shower present.]] On the other hand, Dr. Light's return to form, the upgrade to Calculator, and the rarity of a CrisisCrossover focused more on a personal level than on an apocalypse, were all critically lauded elements.]] Not to mention it led to Ralph's epic storyline in ''ComicBook/FiftyTwo''.
* CreatorsPet: The writer is an admitted Deathstroke fanboy who wanted to establish his favorite character as a badass. And he did so in the most fanboyish way possible: clumsily. Deathstroke's victory over a JusticeLeagueOfAmerica team can only be described as a complete and total Ass Pull. Sure, the team of heroes he fought didn't include Batman, Superman, or Wonder Woman (two of whom would barely notice Deathstroke if he attacked them, and the third, Batman, would be ready for him if he did), but it ''did'' include the Flash and Green Lantern, neither of whom was portrayed as actually ''knowing how their own frigging powers worked'' during the fight. Key pieces are being somehow faster than the prototypical SuperSpeed superhero and overpowering Green Lantern's ring by developing stronger willpower (a facet that would be a reason for ''him'' to have the ring to begin with, not to mention not being how the ring works at all). It also included a direct reversal in how the Atom's powers normally work (the Atom ''does'' normally retain full mass when he shrinks) for no reason that was ever stated, and a complete and arbitrary nerfing of Black Canary's superpowers (she's easily able to rip through several feet of steel-reinforced concrete with her Canary Cry, but apparently penetrating a single layer of burlap over her mouth is beyond her abilities if it's ''Deathstroke's'' burlap sack).
* FranchiseOriginalSin: Many fans feel this story and its extremely dark tone permanently changed DC for the worse. ''Identity Crisis'' was a come-from-behind sensation at the time, and as a result many of DC's other books took cues from it - in particular, its success meant it was now "okay" for superhero comics to depict sex and violence in more graphic ways. The trend ultimately led to much more unanimously hated stories like ''ComicBook/AmazonsAttack'', ''ComicBook/CountdownToFinalCrisis'', and ''ComicBook/JusticeLeagueCryForJustice''.
* HarsherInHindsight:
** All those stories from the 1940s, 1950s, and 1960s in which the heroes use super-hypnosis and magic rings and so on to alter the villains' minds or remove knowledge of their secret identities from others read very differently given the revelations of this series. So does Doctor Light's time as an IneffectualSympatheticVillain.
** ''Justice League of America'' volume 1, #122 gets hit especially hard: it's a story that explains how the Leaguers decided to reveal their identities to one another, after Doctor Light uses "Amnesium" to scramble their knowledge of their alter egos, learn their secrets, and nearly kill them all. In the end, Light is mindwiped with the Amnesium to remove his ill-gotten knowledge. The story's title? "The Great Identity Crisis."
** An earlier event, the more nostalgic ''Silver Age'' series of "skip week" specials, also has agroup fof villains learning the Justice Leaguers' secrets...and in the end, Hawkman uses some Thanagarian technology to remove this knowledge from their minds, with the sanction of Superman and Batman. The whole thing is played as a ResetButton style happy ending. The Silver Age: Justice League chapter also contains a scene in which Doctor Light rejects Catwoman's advances, stating that he "has always been more interested in test tubes and Bunsen burners than the fairer sex."
* MemeticMutation: The series inspired a fad on the Website/SomethingAwful forums of user avatars showing their [[WildMassGuessing Wild Mass Guesses]] about the identity of Sue Dibny's murderer. The response to the series played a role in the formation of the "Batman's Shameful Secret" forum for comic book discussion on the site.
* MoralEventHorizon:
** Crossed when [[spoiler: they used Zatanna to alter Dr. Light's personality - which led to them using Zatanna to wipe ''Batman's'' memory.]] Even ''Ralph'' is shocked to learn of it, of all people.
** Not to mention [[spoiler: Dr. Light and the whole, y'know, raping Sue Dibny thing.]]
* OneSceneWonder: Deathstroke, ''and HOW''.
** A quieter one: Sue's funeral is the last physical appearance of [[{{Starman}} Jack Knight]] (he's next to Stargirl).
* ShockingSwerve: [[spoiler: Jean Loring being the murderer]] when pretty much ''all'' of the evidence beforehand suggested somebody else. Rather impossible in some degrees, since there is a panel where [[spoiler:someone else's hands tie the knot on which she fakes her own hanging]], which is dropped when the murderer is revealed.
* TheWoobie: Several, particularly Elongated Man and [[spoiler: Robin]].
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