Why does Supes know his mother’s name?

Why is he saying it now?

OH, that’s Supes’ mother but I have a hackneyed chance at making right at not being able to save my mother?

I think going forward we’ll see a more traditional portrayal of Batman from Affleck; however, I also think we needed this hardened vigilante to starkly contrast the Batman we expect. He’s broken and he shows it.

Granted, Daredevil had many more hours to explore those themes, but Batman v. Superman’s problem wasn’t that it was too short to explore them; it’s that it barely seem to understand those questions or why they’re important.

Superman and Batman would’ve had plenty of reason to come into conflict without Lex being involved; his presence was frustrating both because it was unnecessary and because it greatly reduced the drama of the conflict between the characters. “Some obnoxious kid tricked us into punching each other until we realized our mom had the same name” is just an objectively weaker story than “We came into conflict with one another because of our incredibly different and fundamentally incompatible philosophies.”