I personally though Spacey as Luthor was the worst thing in SR. At first I thought it would be decent, then he turned out to be Superman 4 level Luthor.
Lex needs to be close to Supes/ Clarks age. I hope the rumors about this being based off Birthright are true, a truly epic story redoing Supes & Lex origins.
And to anyone still wanting a big screen version of Smallville, go screw yourselves. That show is as bad as the old syndicated Superboy TV show from the 90's, except they butchered everything Superman about it. You guys are like Spider-man fans who love the Clone saga and Venom, then give people crap when they mention Scorpion or The Vulture as big villains.