I've heard mixed reviews on the movie, but I plan to judge for myself when I finally get around to seeing it. One thing's for sure, the special effects will be sweet. You can tell that by the previews and the fact that Bryan Singer directed it.
I hear it's almost a direct sequel to Superman 2, not Superman 4. In fact, I think they're pretending Superman 3 & 4 didn't happen, which sucks, but that's apparently the way they went. I was hoping they'd start the series over the way Batman Begins did, but I guess that was hoping for too much. I guess that means Lex still doesn't get to be the respected businessman/arch nemesis that he was in the comics.
