Snyder: "In the original version of the script Zod just got zapped into the Phantom Zone. David [Goyer] and I had long talks about it, and Chris [Nolan] and I talked a lot about it. I was saying, ‘I really feel we should kill Zod and I feel that Superman should kill him.’ For me, the why of it was: if it’s truly an origin story, his aversion to killing is unexplained. It’s just in his DNA. I thought if we put him in an impossible situation, forced him into it, it would work. I felt like that could also make you go, ‘Okay, this is the why of him not killing ever again.’ He’s basically obliterated his entire people and his culture, and he is responsible for it and he is just like… ‘How could I kill ever again?’ Even though Zod says there’s no way this ends without it. ‘What are you going to do? Put me in jail? I don’t know what you’re going to do with me but I’m gonna just keep doing this until you stop me. I’m just a killing machine, especially now. I had a task before but you’ve robbed me of that too.’"