Re: Kryptonite in first film... Extent of use?
I think it should be in the film, but used in a more interesting way than before. I loved what they did with it in Birthright. I also love the idea of Lex in a Kryptonite battlesuit. And of course, Metallo is powered by it, so that would work.
Anything besides Lex just pulling it out of his pocket and holding it up to Superman. I am so sick of seeing that.