Frankly, not only has it not happened, it is not happening, and we don't need it! God has revealed Himself to humanity through the Word, Jesus Christ "Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men," (Philippians 2:6-7) and also through His written word; the Bible.
I could go on and on...and on about the reliability of the Biblical texts (which I did in a previous post). But I'll just post what Jesus said, "For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished," (Matthew 5:18) and, "Heaven and earth will pass away, but My words will not pass away" (Matthew 24:35), not done yet, "Jesus answered and said to him, “Blessed are you, Simon Bar-Jonah, for flesh and blood has not revealed this to you, but My Father who is in heaven. And I also say to you that you are Peter, and on this rock I will build My church, and the gates of Hades shall not prevail against it" (Matthew 16:17-18).