Life would go on.
If we were to find out that evolution was nothing but a big giant hoax and conspiracy then it would mean just that and guess what, life woudl go on.
If we were to find out the the SUn revolves around the earth then what? Life would go on.
If we were to find out that God was nothing but a supreme space traveller, billions of years old then guess what, life would go on.
Just as life goes on with those thet leave the JW's, those that stay and those that never bought into their BS, life goes on.