Re: Kryptonite in first film... Extent of use?
I'd rather have no kryptonite used in this film; it does not seem necessary since Zod will be the in it and he should be able to go toe to toe with Superman.
When Kryptonite is introduced in later films I hope that they maintain its effects realistic - I mean, I hope that Kryptonite does not just zap all of Superman's powers instantly, it's better to have it affect him slowly. If a villain uses Kryptonite on Superman, he should still be able to have his powers - able to take off a Kryptonite necklace and throw it away far enough to save himself.