Zach Snyder can't deliver. It's going to suck for the opposite reasons that Superman Returns is unfairly maligned.
Where Returns was pretty much all heart and little action, Man of Steel is going to be all flash and no substance. But Snyder is going to lift shots and motifs and even the score from other, much more talented film makers to give a surface sheen of depth because he lacks any understanding of why those things worked in those other films.
But Superman and Zod's speedramped fisticuffs will sure look cool.