In an interview with Empire Magazine (see their Superman cover below) Cavill had this to say:
“It’s not a dark movie by any means. Past representations of the character have been quite light… This is a more realistic view of the character, while still maintaining the very unrealistic, or potentially unrealistic features of an alien with superpowers.”
So if you were worried that Superman was going to start speaking in a growl and spending his time sulking in the shadows you can probably relax a little.
"Man of Steel" flies into theaters June 14th.