Originally posted by CosmicComet
It's not the idea of Lois being killed that makes me think Superman would go rogue.It's the idea that Batman--a man he trusts more than anyone else and even considers his friend, would actually do so out of some precautionary protocol that goes entirely against what he thought Batman and himself believed in.
Superman's willpower is up there with the best of them. But he's not beyond having a snapping point. That's one of things people are always worried about when it comes to him afterall.
Betraying trust for a precautionary protocol already happened too (Tower of Babel arc). Batman was just kicked out of the league.