I, and many others, have come to the conclusion that the only way anyone will ever know if any God or Gods exist(s), is when that God or set of Gods makes themselves empirical. Until that point in time there are only those whom can assert that God(s) is real, and none that can prove it. An overall waste of time, and, if it weren't such a present issue in today's society, pointless discussion that has only a base in philosophy.
In conclusion, even if we found out every single fact in concern to the universe, the chances of a God being proven real are non-existent to my current knowledge.
But there will most certainly be those around who will always assert a Gods place in reality, and still will be unable to prove any such thing.