Jon Hamm To Play New Superman?

Reports are saying that Warner Bros. are really considering to close the deal for the "Superman" role with Jon "Mad Men" Hamm. I guess he looks more like the role than the others. But he's pushing 40 years old. And he'll be like 42 going on 43 when "The Man Of Steel" hits cinema's in December 2012.
I guess he could be okay, as Robert Downey Jr is older (like 44/45) in the role of Tony Stark aka Iron Man. We'll probably find out who Warner will pick soon.