MMM WHATCHA SAAAAAYYYY
This is actually what startedthe Batman vs. Superman thing. The Joker blow up the Daily Planet or something like that and Superman lost it. He just straight up killed him and Batman saw it. You know how Batman’s thing is dont kill people even if you have the power to, so he decided Superman couldnt control himself. He had too much power and had to be put to a stop. Thus the beginning of Batman vs. Superman.