They should do a reboot, I loved Superman Returns when it came out, then watched it again twice & just hated it, it's not what we wanted or were ready for... Jimmy has a bowtie, does he still wear that in the comics?.. Whats with this timeless look & keeping in with the Chris Reeve films, we don't need to do that, if we want Chris Reeve we'd watch his films, whatsup with the worn out relationship with clark & lois, I want to see Lois fall for Clark, & have a mere crush on Supes, & having a Superman film after 20 years gap with Superman having a son, we were just not ready for that, it's too early, what was Singer thinking?.. He is the Uwe Boll of comic book films, he should give it up...
I'd say, if they could, & are able to manage securing the cast & crew, they should go with the cast of Smallville, but make the film so that you wouldn't have had to watch Smallville... I mean Tom has proved he can do a great Metropolis Clark in Noir & that he can play Superman, Erica Durance would be a great Lois Lane, their relationship on Smallville (which I think is odd as it's too soon for them to meet) is much better than SR, they have a love hate friendship, which can easily lead to more if they spent more time together which they would at the Daily Planet, the whole cast of Smallville would be great, I wanna see Lex Luthor, the evil Bastard businessman that belives the work he is doing is for the greater good, we've had enough of the humourous overweight lex from the movies, Lex from smallville is the lex we should see...
If they couldn't secure the cast of Smallville, I'd say go with an unknown again, someone who doesn't bare similarities to any of the actors who played superman before, Hugh Laurie for Perry White, it's hard to think outside of the Smallville box...