Hi Quigly;
When Jesus the Son of Man returns, "He will sit on the throne of His glory." > Matt. 25:31, who is Him who sits on the throne in Revelation chapter 4.
"While they (Men of Galilee) watched, He was taken up, and a cloud received Him out of sight. While they looked steadfastly toward heaven as He went up, behold, two men stood by them in white apparel and said, --- This same Jesus who was taken up from you into heaven will come so in like manner as you saw Him go into heaven. > Acts 1:9-11.
He who sat on the throne said to John, I am the Alpha and the Omega ---" > Rev. 21: 5-7.
Him who sits on the throne is the Alpha and the Omega, the Lord God Almighty. > Rev. chapter 4.
The Alpha and the Omega, the Lord God Almighty is Jesus because He said "My Father" written in Rev. 2:27, Rev. 3:5, Rev. 3:21
Jesus introduced Himself to John saying, I am the Alpha and the Omega, the Beginning and the End, who is and who was and who is to come, the Almighty. > Rev. 1:8.
Before Jesus was taken up He said, "for I say to you, you shall see Me no more till you say, "Blessed is He who comes in the name of the Lord" > Matt 23:39 - Luke 13:35.
"He who overcomes, I will write upon him the name of My God and My new name." > Rev.3:12.
"He who comes in the name of the Lord", > Him who sits on the throne will write upon him the name of His God and His new name.
It is written that this Lamb had a name written that no one knew, but he himself > Rev. 19:12, This Lamb, He who comes in the name of the Lord is the one that came and took the book/scroll out of the right hand of Him who sat on the throne
--- He himself will rule them with a rod of iron. > Rev. 19:15.
--- He himself is the male Child born to rule all nations with a rod of iron. > Rev. 12:5.
--- He himself is He who overcomes > "He shall rule them with a rod of iron; --- as I also have received from My Father; > Rev. 2:26-27,
Him who sits on the throne said, "To him who overcomes I will grant to sit with Me on My throne, as I also overcame and sat down with My Father in His throne." > Rev. 3:21.
He who sat on the throne said, "He who overcomes shall inherit 'All things', and I will be his God, and He shall be My son." > Rev. 21: 5-7. The son of Him who sits on the throne is the Lamb in Rev. 5:13, 6:16, and 7:10, who shall rule them with a rod of iron > Rev. 19:15, Rev. 12:5, and Rev. 2:26-27.
He who is holy, He who is true says, " He who has the key of David, He who opens and no one shuts, and shuts and no one opens. I know your works. See, I have set before you an open door, and no one can shut it; for you have a little strength, have kept My word, and have not denied My name. --- I will make them come and worship before your feet, and to know that I have loved you." > Rev.3:8.
Him who sits on the throne, who is holy and true has set an open door in front of him who has the key of David, who is the one came and took the book/scroll out of right hand of Him who sat on the throne. In Rev. 5:13, 6:16, and 7:10, the Lamb is He who comes in the name of Him who sits on the throne, and this Lamb is Lord of Lords and King of Kings to come as written in Rev.17:14 and Rev.19:16.
Peace be with you, Paul