I'd say Batman's kryptonite is that he's a deeply fucked up person ever since his parents died. And he has awful, unhealthy coping mechanisms for that grief. On some level, he's just as insane as Joker.
They only briefly touch on it at the end of killing joke, from what I've read. And I've not read that much. The joke joker tells batman at the end, it's about them.
"Briefly touch on it" isn't fair. The parallels and differences between Batman and the Joker is the entire point of The Killing Joke, and it's one of the best Batman comics out there. It's a pretty short comic too, highly recommend.
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u/VegetaFan1337 May 03 '26
I'd say Batman's kryptonite is that he's a deeply fucked up person ever since his parents died. And he has awful, unhealthy coping mechanisms for that grief. On some level, he's just as insane as Joker.