Did you watch the movie? He wanted to do what Ras failed to do, and he knew that the Batman was the only one who could stand in the way.
Do they ever say that they hated Ras when they were excommunicated?What changed after Batman killed Ra's Al Ghul to make his daughter and her excommunicated friend go from hating him to wanting to fulfill his destiny?
He has a dream about being the super best awesome guy in the world, and there's a huge bat in the dream I believe, so when he hears about Batman he puts 2 and 2 together.what were his motivations in the comics? Pretty sure he just wanted to beat the shit out of Batman and rule Gotham
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