Re: Kill The Kryptonite
I think it might be cool to play with people's expectations first.
My idea would be for Lex to find some small amount of Kryptonite but not understand how it's used. But in the aftermath of the Battle of Metropolis, people start getting sick with classic "Kryptonite" symptoms except Superman. Lex has manufactured a crisis with a synthetic virus. Lex uses that to turn people against Supes and it's not until Superman confronts him that we see Superman exposed to the real stuff and Lex now knows how to beat Superman in the third movie.
"Great men are forged in fire. It is the privilege of lesser men to light the flame."- War