I wonder if director Snyder will be a traditionalist when it comes to Superman's costume. There's always pressure from somewhere to "modernize" the outfit.
I don't think he really has any other choice than to be traditionalist or extremely close to traditionalist. They fan backlash would be unprecedented and the problem with that is that everyone is a fan of Superman. Whether they are a "big" fan or not, Superman is so much of an icon that messing with the iconism of him would be messing with like everyones childhood.
I did like the suit in Returns though.