Let us be reminded the word of God says: “Jesus Christ the same yesterday, and today, and forever” (Hebrews 13:8).
The New Heavens and New Earth were already created from the beginning at the sametime as this world (Isaiah 65:17-18).
“God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also [HE MADE THE WORLDS]” (Hebrews 1:1–2).
Jesus says: “My kingdom is not of this world” (John 18:36).
“The LORD hath prepared his throne in the heavens; and his kingdom ruleth over all” (Psalm 103:19).
Jesus explains in detail the events when he comes on the Last Day for the Day of Judgment to separate the sheep from the goats (Matthew (Matthew 25:31-33, 41, 46).
“Then shall the King say unto them on his right hand, Come, ye blessed of my Father, [INHERIT THE KINGDOM PREPARED FOR YOU FROM THE FOUNDATION OF THE WORLD]” (Matthew 25:34).
In the Book of Revelation John foresaw the Last Day, Day of Judgment, saying: “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]” (Revelation 20:11-15).
“And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband” (Revelation 21:1-2).
The day is coming when the New Heavens and New Earth will be revealed.
“While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal” (2 Corinthians 4:18).