No, he's right, all passages used to support a future millennium are actually referring to the new earth. And yet, you're also right that the new earth comes after the millennium. I'm not sure why you think your point is an argument against his.
If you think this, they you are rearranging Revelation. Why would you do that?
Rev. 20:2 He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a
thousand years.
3. He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations anymore until the
thousand years were ended. After that, he must be set free for a short time.
7. When the
thousand years are over, Satan will be released from his prison...
9. They marched across the breadth of the earth and surrounded the camp of God’s people, the city he loves. But fire came down from heaven and devoured them.
(Has there been ANY mention of a new heaven and earth up to this verse? No. )
11 Then I saw a great white throne and him who was seated on it. The earth and the heavens fled from his presence, and there was no place for them.
Then WHEN? Then, AFTER the thousand years are over and AFTER fire has come down and killed all those who were stupid and wished to fight against God.
Note carefully, AFTER all these things, the 1000 years and the fire, THEN John saw the great white throne and saw that earth and heavens fled.