Mormons aside, what's wrong with creation ex nihilo? That's just that God created the world from nothing right? Am I misunderstanding what that means? All my understanding of Latin comes from me being fluent in English.
Genesis
1In the beginning God created heaven, and earth.
2 And the earth was void and empty, and darkness was upon the face of the deep; and the spirit of God moved over the waters.
There is no pre-existing chaos, that's the kind of thing you'd find in Greek Mythology. The only thing that is uncreated is God.