And THEN what happens?
7 And when the thousand years are expired, Satan shall be loosed out of his prison,
8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog, and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
9 And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.
10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14 And death and hell were cast into the lake of fire. This is the second death.
15 And whosoever was not found written in the book of life was cast into the lake of fire.
16 I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.
17 And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely.
18 For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
19 And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book.
20 He which testifieth these things saith, Surely I come quickly. Amen.
Even so, come, Lord Jesus.
21 The grace of our Lord Jesus Christ be with you all. Amen.
Not sure of your point. Believers will come before the Judgment seat of Christ after the Tribulation. As your post said they will reign with Christ for a thousand years. Then there will be the Great White Throne judgment of unbelievers. The GWT judgment will not be in heaven or on earth. The Bible doesn’t specify where the GWT is located, only where it isn’t (both heaven and earth fled away from it). When the unrighteous are disposed of the New Jerusalem comes down to earth from Heaven. With an area of 1,960,000 square miles, that leaves a lot of room for the redeemed who will live there, no doubt in the “many mansions” Jesus spoke about.