Re: Superman (casting, rumors, pix till release)
Seems like an odd question, I mean in any iteration of Superman we could ask the same question. "Why a red cape?"
The imagery of it certainly isn't only rooted in Superman from our world capes existed before then. Clark got it from one of those places, that or an in-universe superhero (Smallville had one.) Who said the idea of wearing a red cape and standing boldly with your fists at your hips can only come from Superman?
In the context of Man of Steel
, he most likely wears it to honor his Kryptonian heritage in general and Jor-El in particular.
"I'll see you in another life, brother."