If God were real then we should have the capability of freewill. But then if by chance we do have free will that's still not saying that a god is real. But what it does still say instead is that if there is no free-will then there can be no god. Nothing in favor of theism among those scenarios that I can see. And it does look like atheism can exist regardless of the which of the above outcomes is valid. But then can't co-exist with theism if God is real. Which leaves us something to work with I suppose. That is atheism's position, its validity you could say, is under challenge. Because for God to be real atheism must represent an invalid position in relation to theism.