A bit late to the party here but it seems this isn't an argument about whether or not God exists but where this whole universe came from. To date, neither religion nor science can prove any hypothesis about where the universe came from. And to say that science will figure that out eventually seems like scientism, or putting the same kind of religious faith in science that the religious place in God.
I don't think it belongs in the theology department, either. Probably better suited in the rigors and frameworks of philosophy than any other discipline. The same goes for scientists who believe that science will eventually answer all the questions. Why? Because science cannot empirically test whether or not science will answer all questions. It's a philosophical statement.