I believe Rev. Moon is the returning Christ, Lord of the Second Advent, returning Jesus.

Lord of the Second Advent

"In accordance with the laws of restoration through indemnity, the person representing perfected Adam had to face a situation of betrayal, even by God Himself. Only then could the walls that were raised in God’s heart be brought down. In this way, everyone was against me, and even God was standing on the other side, leaving me totally alone. Still, the spirit world could not be left as it was, in a whirlpool of chaos. God had to make the final decision. He proclaimed, 'The transition of the lineage, transition of the rights of ownership and transition of the realm of heart that Rev. Moon speaks of, are true.' I then had to return here, to this world, after receiving God’s seal as a victorious champion." October 9, 1994, Cheon Seong Gyeong, p. 945, 264-50, 1994.10.9

"What must someone do in order to become the Lord at the Second Advent? You need to go to the spirit world, reveal the principles concerning the relationships of all religions centering on Jesus, clarify everything about heaven and earth and their laws, and receive the approval of the spirit world. You have to proclaim these things on earth. This is something that has not been known even in the spirit world. Only God and Satan knew of this. After I had proclaimed all these things in the spirit world, strong opposition arose there. In that world, a time of chaos came about for forty days. Satan resisted by setting the condition of denying God. As a result, the spirit world was divided in half, with one half against me. In the end, this chaotic situation had to be resolved based on what God decided to be true. That is why the True Parent brings the spirit world into complete submission, receives God’s seal of approval and comes down to the earth." November 9, 1992, Cheon Seong Gyeong, p. 944, 236-323, 1992.11.9

‍"Women are Eve; they cannot decide on their own paths to follow. You want to keep my photograph and live day and night before me. You don’t want to go somewhere else and get married. Even after 100 years, when you are in the spirit world, you can call out "Father" and we can meet and discuss things and understand each other fully in the same way that I am able to communicate with heaven. Do you think you will not be able to communicate this way? I am trying to liberate you." July 7, 2009; East Garden, Tarrytown, NY, Owner of Peace, Owner of Lineage

"The work of God is restoration, always in the opposite direction from His original loss. This means that God first needs to find His perfected Adam, and Adam who instead of betraying God will become one with God. And then Adam must restore his bride in the position of Eve. Therefore, the promise of the Lord of the Second Advent will be fulfilled. He is destined to come to earth as the Son of Man in the flesh. He comes as the third Adam. He will take a bride and thereby bring about the most joyful day of heavenly matrimony, referred to as 'the marriage supper of the Lamb' in the book of Revelation. He will fulfill the role of True Parents." New Orleans, LA; October 28, 1973, The Future of Christianity, God's Will and the World (1985), p. 226, 227

“Since humankind has received satanic blood, people cannot return to God on their own. So the Messiah must accomplish absolute restoration of the lineage, renewing the bloodline that was defiled by Satan. This transition must be made. This is why the Messiah must surely come.” January 7, 1988, Cheon Seong Gyeong, p. 127, 172-53, 1988.1.7

"There were three ages in history: the Old Testament Age, the New Testament Age, and the Completed Testament Age. Among these, what kind of an age was the Old Testament Age? It was the age of redemption of children through sacrificial offerings. It was a time preparation for the coming of God’s son. In the New Testament Age, Jesus became the offering for us to receive the parents. This is why, in the age of the Second Coming, we have been preparing to receive the parents by establishing the bride and bridegroom. The reason that I, having the name of the True Parent, have been suffering for forty years as the center of the Completed Testament Age, is to receive God on earth. This will lead to the oneness of God and humankind in love." February 10, 1992, Cheon Seong Gyeong, p. 127, 227-94, 1992.2.10