You could say Joker, since the things he does push him to abandon his morals, which is a major fear of Batman's.
This raises the question as to why Batman was scared of Lex Luthor specifically. The reason Batman's other villains can't compare is that Lex Luthor is the literal foil to Bruce Wayne. Bruce's greatest fear is becoming the very evil he fights against every night, which explains Batman's no-kill rule.
Batman's indomitable fear is that there will come a day when he will no longer be able to fight for the ideals he held so dear. That he would snap beyond repair, no longer protecting the morals such as his "no-kill" code that he stood for all his life.
So, without a doubt, Kiteman is the weakest of all the villains. The character appears in the animated series Harley Quinn, in which Matt Oberg voiced him.
Batman has fought numerous villains in his time as the Caped Crusader, but few have harmed him and his allies as much as the Joker has. Batman has admitted several times that his enemies don't get worse than the Joker, so it's obvious that the clown has left a deep scar in Batman.
Batman Is Afraid To Be In The Company Of Bats
As a child, Bruce's fear of bats stemmed from falling in a cave where he encountered the animal. He continued to harbor it as an adult, although Bruce used the very fear as his strength. Batman Begins: Bruce Wayne embraces his worst fear.
Also known as the Clown Prince of Crime, the Joker is the arch-enemy of the Dark Knight — one capable of such unthinkable evil that can make even Batman shudder.
The Hulk is one of the most powerful beings in the Marvel universe. He possesses incredible strength, durability, and the ability to heal quickly. His strength is almost limitless, and he can easily defeat practically any opponent. Batman would struggle with Hulk's raw power and incredible strength.
Freeze, Penguin, or The Riddler. However, through his own actions, Batman has proved a surprise villain, KGBeast, is actually who he seems to hate most, as he bent his iconic no-kill rule and left him for dead on multiple occasions.
Batman's greatest weakness in DC History may be his one rule: no killing. Bruce Wayne's no-killing rule, while it reinforces his moral code from time to time, it's also used against him by his enemies.
Although Batman is a skilled fighter and has a lot of defensive techs, he“s just a regular human and has no inherent superpowers. This doesn“t matter when dealing with “regular”“ criminals, but when faced with the likes of Bane or Mr. Freeze, Batman becomes vulnerable to injuries or freezing just like any other human.
As I mentioned in the opening, Batman's obsession is his mission to rid Gotham of crime. In Prey, we see a Batman who's consumed by his mission.
As for Batman, the Joker respects Batman so much he often seems to define himself by Batman. If Batman is more lighthearted, the Joker becomes more fun. If Batman becomes more serious, he becomes more dangerous in response. Batman and his world seem to be the only things the Joker cares about.
To Be Forgotten
While fans got to hear many memorable quotes from Joker in Batman: Arkham, the series also revealed what his greatest fear is supposed to be. As it turned out, The Joker feared being forgotten more than anything else because it meant nobody was afraid of him anymore, rendering all his crimes void.
Overall, the classic villain, the Joker, has been a prominent member of the Batman franchise, and he has been portrayed in a variety of different ways since the 1960s.
As Batman's arch-nemesis and opposite, Joker presents a constant challenge that tests Bruce Wayne's morals and detective skills. Other great villains include Poison Ivy, Bane, Catwoman, Ra's Al Ghul, Harley Quinn and Two-Face, who all helped to create one of the greatest comic book universes ever created.
Riddler is one of the most intelligent enemies Batman has ever faced, but he's not a fighter. So the idea of a cerebral villain like Jonathan Crane undergoing a Hulk-like transformation makes Scarecrow one of the most dangerous enemies Batman has ever faced.
Batman, well, he's got some money and nifty gadgets. When it comes down to it, in every aspect, Superman is better than Batman. Superman is stronger, he's been around longer, he's a hard-working man, and he's just a better person.
Furthermore, Batman is mysteriously able to see Luthor despite his blindness, the implication being that the darkness is selective at the whims of Abyss. Regardless, Batman's capabilities as a fighter are proven extremely well with the absence of his sight.
While many may point to the injuries inflicted on Batman by Spawn, Bane, or Hush as the closest he's come to death, one other fight takes the cake. When a Predator showed up in Gotham on a hunt, anyone reading the comic knew he would eventually come into conflict with Batman.
Most incarnations depict Brainiac (alias Vril Dox) as a bald, green-skinned alien cyborg or android from the planet Colu and one of the most dangerous villains in the DC universe, capable of possessing others, inventing extremely advanced weaponry (such as force fields and shrinking rays), physically matching or ...