3 Batman Villains Who Got More Terrifying Over Time & 3 Who Mellowed

Published Jul 30, 2026, 6:30 PM EDT Robert Wood is a writer and editor based out of Cheshire, England. He is the author of 'The False Elephant: and 99 Other Unreasonably Short Stories' - 100 stories, each told in exactly 100 words. Rob got into comics via Bendis' Ultimate Spider-Man and the UK anthology 'The Mighty World of Marvel,' which was running Frank Miller's Daredevil, Classic Hulk and Contest of Champions II. Prior to journalism, he worked in copywriting and copyedited for Oxford University Press. He is on X as @PinchTwigs and Instagram as roobwoodjourno. Every superhero fan knows that Batman has the most compelling rogues gallery in comic history, however his villains aren't static. Over the decades, many have only become more and more terrifying. But there are also a few who have mellowed, becoming significantly more sympathetic or even heroic. For this list, we're looking at the characters who started out extreme and became more reasonable, and the characters who started out as minor threats and became unholy terrors. We'll be covering the biggest-name Batman villains who fit into these categories, as well as some honorable mentions who aren't so easy to define. More Terrifying: Riddler For decades, Riddler was depicted as a thief who loved puzzles and showing off his intelligence. Indeed, Riddler stayed so low-threat for so long that one of his most famous stories is 'When Is a Door... The Secret Origin of The Riddler...' (Neil Gaiman, Bernie Mireault), where Riddler laments that Batman's other villains have turned dark and gritty, leaving him behind. Riddler's first kill came in 1977 and he became darker and darker as the years passed. Notable slides into horror came in the 'Zero Year' arc, where Riddler plunged Gotham into chaos, and his attempt to summon a demon through ritual murder in 1990's 'Dark Night, Dark City.' Of course, the darkest take on the Riddler comes from 2022's The Batman movie, where Paul Dano portrays him as a mentally ill terrorist who believes he's working with Batman. More Reasonable: Poison Ivy Starting out as an ambitious, amoral thief, Poison Ivy was retconned into an ecoterrorist in 1988, gaining control over plantlife as she went. In the past, Poison Ivy has been depicted as an outright threat to all human life, hoping to kill off homo sapiens to gift Earth back to its natural flora. However, as time has passed, real-world readers have grown a lot more aware of ecological issues. As attitudes have changed, Poison Ivy has been depicted as more of an antihero and even sometimes as a hero, with her relationship with Harley Quinn humanizing her even further. Today's Poison Ivy is more often depicted going after truly despicable villains than being a threat herself, and when she does threaten lives, it's shown to be a morally complex situation, or one that got out of her control. More Terrifying: Scarecrow Scarecrow has always been scary, as Jonathan Crane used psychological trickery to study fear and settle personal scores from the very beginning. However, especially with the introduction of his fear gas in the '60s, Scarecrow has gone from psychotic to demonic. In today's comics, Scarecrow's overuse of his signature gas has left him unable to feel fear except when being chased by Batman, causing him to commit horrific crimes to keep the Dark Knight's attention. He's tortured children, mutilated his own body, and launched wide-scale terrorist attacks on Gotham as part of either his experiments or his efforts to feel fear again. All the while, Scarecrow's design has gotten creepier and creepier, from a sewn-shut mouth to hyperdermic-needle gloves to Jorge Jiménez's depiction of the villain as a gas-masked apparition (above.) More Reasonable: Killer Croc Suffering from an extreme case of atavism, Waylon Jones' body has grown scales and sharp teeth and claws, turning him into a monster. While he's a vicious threat, he's also sympathetic, living as a criminal because he was ostracized by society. Indeed, Croc often works with Batman, and is frequently shown defending communities of outcasts who see him as a protector. That's a million miles from his first appearance in 1983's Detective Comics #523, where he was a vicious gangster who murdered the aunt who raised him. Killer Croc was even responsible for killing the parents of second Robin Jason Todd by feeding them to crocodiles - a dark act which was later retconned out of canon. Croc has grown stronger and bigger over time, but he's also gone from a callous murderer to conflicted muscle and protector. Honorable Mentions The Joker - Batman's nemesis is so chaotic and variable that he could apply to both categories on this list. Joker debuted in the 1940s as a vicious killer with a deliberately scary design. In the 1950s, public outcry about comics corrupting the youth made him more of a playful clown. However, in the 1970s, he once again became a terror, and has warped into a truly twisted serial killer in the decades since. The Penguin - Penguin was originally depicted as a deranged criminal obsessed with umbrellas and using birds in his crimes. Today, he's way more of a vicious gangster who will personally bite your throat out if you cross him, but who will strike a deal and even inform on other villains if the price is right. Does that make him more or less terrifying? You decide. Clayface - Basil Karlo was originally a human serial killer who wore a mask. In the years since, he's become a tragic, shapeshifting villain who has worked with Batman multiple times, despite his powers messing with his impulse control and sense of morality. More Terrifying: Mad Hatter Jervis Tetch's Mad Hatter started out in 1948 as a funny little weirdo who liked Alice in Wonderland and used a gas gun to burgle a yacht club. Following his first appearance, he was replaced by a different version of the villain who relied on hat-based gadgets for his heists. In 1982, Jervis returned with a vengeance, murdering the impostor and revealing he's been locked up in Arkham for years. This Jervis is one of Batman's most delusional villains, often seeing the world as an Alice-inspired fantasy, and using his mind-control technology to control his own emotions. The more Mad Hatter appeared, the creepier his Alice in Wonderland obsession got, with some extremely dark implications. Robin: Year One depicts him using his tech to kidnap and traffic teenage girls, while the iconic Arkham Asylum: A Serious House on Serious Earth strongly implies he's a sexual predator. More Reasonable: Catwoman The ultimate femme fatale, Catwoman straddles the line between hero and villain, fighting for Gotham's underclass the way she thinks is best, even if it clashes with Batman's principles. While she's still an unpredictable agent of chaos, Catwoman's recent turn towards explicit heroism has unavoidably mellowed her from her more selfish origins, where she was all about personal profit. Nothing stresses the change like one look at her original costume, back when she was just known as 'the Cat.' Having posed as an old woman in her original outing, Catwoman appeared in Batman #3 with an ensemble straight out of a horror movie. Ultimately, becoming Batman's main love interest put a ceiling on how wild Catwoman's behavior can be. If she does anything truly terrifying, it would make it hard for DC to reconcile the ultra-strict Batman continuing to associate with her. While Tom King and Clay Mann's out-of-canon Batman/Catwoman tried to restore Selina Kyle's pathological side, showing her killing Batman's villains after his death, the mainstream consistently depicts her as a master burglar fighting for the underprivileged, albeit with more moral flexibility than the rest of the Bat-Family. Those are the three Batman villains who became more terrifying over time and their more reasonable counterparts - let us know below which of our entries you agree or disagree with, and who else belongs on this list. Created By Bob Kane, Bill Finger First Appearance Detective Comics Alias Bruce Wayne Alliance Justice League, Outsiders, Batman Family Race Human Franchise D.C.