My prediction is that the black color roof is going to be optional. Here is what a body color roof would look like.
I'm inclined to choose this body color roof because if I decided I wanted to change to a black roof later, I could easily do that with vinyl. Would be more difficult the other way around.
Black to give it that lower profile effect and it's unique. Would be great if part is lighter CF just like on some BMW Ms, but maintenance could be an issue.