Miller and Romita have been talking about Superman: Year One since last year. I liked their collaboration on The Dark Knight Returns: The Last Crusade (which was a far better "death of Jason Todd" story than A Death in the Family was), and I'm curious what they'll do with Superman. Something Miller has said repeatedly is that we shouldn't take his characterization of Superman in the Dark Knight series as how he sees Superman. The Superman of Dark Knight is, by the design of the story, an antagonistic character. As the hero of his own story, the Superman of Superman: Year One will be a very different character.
Well, his Batman has only gotten worse over time, his Wonder Woman is literally the worst version officially printed by DC comics, and his superman is easily bottom 5. He's also, like I said before, a bigoted, sexist jackass who hasn't written anything even remotely acceptable since the late 80s. So, I don't see him pulling a 180 with Superman. At best, it will be crap that his editor manages to remove most of the unprintable offensive stuff from. At worst, its All Star Batman with a different hero.
But, I suppose at the very least DC will keep it from being another Holy Terror, since even dC's weird love of Frank Miller didn't allow him to print that offensive trash as the batman astory it was originally intended to be.