Now that you mention it, I had forgotten Lex was in the sequel until just now, it has been years since I've seen that film. I remember watching both the original and sequels in the theater, loved the first one and the second was great simply because it was Superman and I was about 8 years old, the third and fourth films were just bad, especially the fourth. In my opinion the second film could have been fine without Luthor, I never was a big fan of the Hackman/Beatty duo and think the comedic relief detracted from the film which had great villains in General Zod, Non, and Ursa.