Here's a new frontal picture of Superman on set without his cape from the SuperheroHype boards. It's debatable as to whether SHH or the facebook Superman: Man of Steel (2013) page received the image first, so we'll mention them both!
As you can see in the pic there is no curl and some sort of belt stand in on his waist. Like most have observed, this look is pretty similar to the "Fly By" design.