Batman is wise to make the plans considering how dangerous the JL could be when they go rogue (and they do due to various reasons), but not letting people know he was making plans was a mistake. And adopting the "I did nothing wrong" attitude just makes him look like an absolute *******.
The situation sort of comes up in Alex Ross's Justice, and there he is nothing but apologetic for his plans getting stolen and he blames himself because of course he does not want his friends to be needlessly hurt or endangered because of his actions. It's the difference between a well written Batman and a terrible one.