Re: David S. Goyer IS the Script Writer! - Part 2
The Kryptonian atmosphere was flowing all over the Indian Ocean, and detectable from space by means of spetroscopy. Once Batman knows the chemistry, he can quickly figure out it will have an effect on Superman, and organize a test to see what the effect is.
I smell an interesting game of cat and mouse.
BTW: I love your idea of Batman teaming up with Luthor.