Not sure how accurate this source is, but evidently the Kryptonian rumor isn't true:
http://movies.cosmicbooknews.com/con...-woman-costume
Personally, I'm all for keeping Wonder Woman purely mythological instead of tying her origin to Superman's. One of my favorite differences between Marvel and DC is how they approach the supernatural: in Marvel, it's all ancient aliens or interdimensional beings or whatever, but in DC, gods are real gods and Magic is Magic with a capital M. It'd be nice if there were more distinct differences between the movie-verses beyond "Marvel is really fun and colorful and DC so far is drab and depressing."