I´ve said it many times: I love SUPERMAN RETURNS.
I did not on my first viewing, though. Back then I only liked it but thought the Luthor-angle was been there, done that and his entourage annoying. I also wondered about the third act because I had hoped for something different. But I loved Routh´s portrayal and the action sequences. And, of course, the fact that John Ottman used Williams´ themes for the score.
But on my subsequent viewings I began to really appreciate what Singer had done. It is really a re-boot from SUPERMAN III and IV, going back to the first two films yet being more "realistic" and serious about the emotional complications of being Superman. Having Luthor back actually is a good idea, and Spacey is completely different in it then Hackman. The new Luthor is a really dangerous psychopath, full of hatred. As with Superman, this film is also about Luthor returning.
The film just as well deals with the consequences of Superman´s love for Lois. I always thought the ending of SUPERMAN II rushed the conclusion of that particular relationship. I was wondering: will Lois really not remember? How can he go on working with her, seeing her - he was never portrayed as cold enough for that. So having him encounter his child in SUPERMAN RETURNS actually makes a lot of sense and is very interestingly handled.
Apart from that I loved the idea of a world in which Superman had become known and then disappeared. How would people react? Singer had the right ideas - but it was the wrong timing. BATMAN was the big thing now, and the post 9/11 world was just too cynical for Superman.
I think that MAN OF STEEL mainly has two objectives: to give audiences lots of action and to counter the cynical opinion towards the character - something that the old guard of fans do not have, only young people, not knowing about Superman´s impact. In a way I could imagine the success of THE AVENGERS helping here. I mean, let´s face it: a guy with a hammer and a cape flying around, a green monster, Captain America and so on - these are not really creatures for a cynical viewer. Still, audiences obviously needed lighter-hearted heroes.
And TCR, I know what you mean about Williams´ Superman-theme. But I do think that it would carry too much baggage into MAN OF STEEL. It´s not like the Bond theme, maybe because the Superman theme is so majestic, proud and happy. It will always be one of my most-beloved movie themes. But these days, audiences probably would laugh at it and find it too pompous. Still, I hope that Zimmer will come up with something more memorable than the Batman-droning.