For all those people out there that think that Superman isn't supposed to be dark and gritty : You don't know Superman or haven't read enough books. Batman said? it best when he described Superman as keeping his anger near the surface and using intimidation as a tool towards his enemies as well. Which Superman reluctantly agreed to. When Superman floats there with his arms crossed and his eyes laser red - what is the message he is sending? Superman being angry is a force of nature.
So it is a good thing we have Nolan attached to let some of that dark side show.