Okay, this could just be a rumor. But in an article at Variety, they're reporting that Brian Singer is probably off of Superman. Considering what a yawn fest the last film was, that is absolutely fan-tas-tic news.
However, I'm pretty sure The Dark Knight is not going to be rated PG, as anybody who's seen the first five minutes that's been floating around the Internet can attest, so I have to take everything in that article with a grain of salt.
My guess is Nolan was just saying he was staying away from the kind of R rated violence he's used to.
But Singer off Superman? A man can hope, can't he?
Now, if we could just get Michael Bay off Transformers . . .