In overturning the Law of God the Church would cease to be His Church just as happened to those ecclesial communities formed in and since the 16th century.  The Catholic Church would continue to exist in those people, however few they may be, who remained faithful to the orthodox teaching. Pope Benedict foretold that the Church would lose its influence and its numbers in the world as its members continue to surrender to the hedonistic secularism which has displaced  christianity in Western culture.
Protestants claim in the creeds to believe in the Holy, Catholic Church but of course we know that they delude themselves. In the same way those Catholics who reject the Law of God today, although they may think of themselves as Catholics would be outside the Church. Therefore I will not live to see any change nor will you live to gloat about it.