Besides Theo, I mean...
I watched the trailer here and the first thing I notice is... I don't like the guy playing him. Aside from the fact that he's (dare I say it) CREEPY looking?? Clark Kent should look like a farmboy, not a serial killer. Dude grew up in Smallville, not Gotham.
I also think Tom Welling should be playing Superman, but in order to do that, they should wait about 2 more years.
Annnnd then there is the costume... if you watch the trailer, you'll notice it's DARK. Like Evil Superman:
What's up with that?