Erm... What? Even if you proved that god exists (which is impossible even if he did, which he can't...), then surely you must know that, just because god exists, doesn't mean to say that we will adopt religion, right? I personally don't like the teachings of Christianity and their morals. I think that the question you should be asking is what would it take for us to become theists? Not Christians because atheists have already adopted non-Christianity and the existence of God doesn't inherently justify religion even if it does justify theism.