The guy has a very good Superman look, I think. And his voice is pretty deep as well. Whether or not he can ACT is wholly different, but then again, Christopher Reeve, at the time of filming Superman, was mostly known for soap opera work, so to the public, he was a pretty big question mark as well.
There's plenty of shit, though, that could go WAY wrong. The story, from what we know of it, is pretty iffy already. Especially since a KID is involved. If that kid ends up being SUPERMANS from when he was powerless during Superman II? I don't think that will fly very well.