Originally Posted by
Badou
It's a weird question because you have a character in Snyder's Batman Who Laughs that is a universe ending threat like a Anti-Monitor which was created by the Joker corrupting Batman basically. Bane can't compete with that. Joker as a villain is basically whatever any writer wants him to be even if it goes WAY beyond what I personally think should be the scope of the character. I guess it basically comes down to Joker being the most popular villain so he is the most dangerous in terms of comic book logic.