Lex Luthor: God is tribal, God takes sides! If God is all-powerful He can not be good, if God is good He can not be all-powerful.
Batman: You're not brave. Men are brave.
Bruce Wayne: I've known a few women like you.
Diana Prince: I don't think you've ever known a woman like me.
Wonder Woman: This thing, this creature, seems to feed on energy.
Superman: This thing is from another world, my world.
Wonder Woman: I've killed things from other worlds before.
Superman: [to Batman] Is she with you?
Batman: I thought she was with you.
Batman: I bet your parents taught you that you mean something, that you're here for a reason. My parents taught me a different lesson. Dying in the gutter. For no reason at all. They taught me the world only makes sense if you force it to.
Diana Prince: I walked away from man a century ago, because of the horrors of man.
Bruce Wayne: Man is still good. We break things, tear them down, but we can rebuild. We can be better, we have to be.
Lex Luthor: You don't need to forge a silver bullet. But if you do, you don't need to depend on the kindness of monsters.
Martha Kent: Be their hero, Clark. Be their angel, be their monument, be anything they need you to be... Or be none of it. You don't owe this world a thing. You never did.
Alfred: You're gonna go to war?
Bruce Wayne: That son of a bitch brought the war to us.
Lex Luthor: If man won't kill God, the Devil will do it.
Lex Luthor: Devils don't come from hell beneath us. They come from the sky.
Clark Kent: Civil liberties are being trampled on in your city; people living in fear. He thinks he's above the law.
Bruce Wayne: The Daily Planet criticizing those who think they're above the law is a little hypocritical, wouldn't you say? Considering every time your hero saves a cat out of a tree, you write a puff piece editorial about an alien that could burn the whole place down.
Clark Kent: Most of the world doesn't share your opinion, Mr. Wayne.
Bruce Wayne: Maybe it's that Gotham City and me... We just have a bad history with freaks dressed like clowns.
Bruce Wayne: Twenty years in Gotham. How many good guys are left? How many stay that way?
Alfred: That's how it starts. The fever, the rage, the feeling of powerlessness that turns good men...cruel.
Chosen answer: The beginning is Bruce Wayne's perspective of the events that occurred in the movie "Man of Steel" when Superman and General Zod are fighting (if you haven't seen it, it would explain a lot of BvS events). It's General Zod's ship and the phantom drive. It cuts to 18 months later. Supermen is called to testify in front of a congressional hearing because of his vigilantism over the past 18 months and people are concerned about his actions (like the events in Africa) since he's an all-powerful alien with no way for the people to stop him, so they're very nervous. Bruce seems to blame Superman more than anyone though for the destruction and death of people he knew (and tried to save) because if Superman wasn't on Earth, Zod wouldn't have come to Earth, etc.
Bishop73