Originally Posted by DIRECTOR
based on Zod being in the film now, I don't think Kryptonite is used. At least, there is a story where Superman is where protective gear to use kryptoniite against Zod, I could see that happening
I can totally see the US Army using kryptonite in an attack against both Superman and Zod during a big fight scene.
Probably kryptonite in a weapon form produced by Lex Luthor. It was done before in comics that LexCorp and US Army has several contracts for develop weapons and technologies.