The Bible does not tell us how and what eternity future will be like. The New Heaven and the New Earth is the Millennial reign of Christ. How do we know? Because what prophet Isaiah described as new heaven and new Earth is live in the millennium(Isa.65:17-25). It is still here on this planet Earth but renovated after the devastations of antiChrist’s evil reign and the wrath of God. Men and women in their mortal bodies will repopulate the Earth after Armageddon(Jews who survived the first six trumpet judgments the Gentles who survived the Sheep and Goat Judgment of Matt.25:32-46. There will still be sinners who will die as babies at the age of 100 years. In Eternity future, there will be no death because no man will be in this mortal body of ours. Everybody will possess a resurrection body. Eternity future occurs after the Final resurrection and the White Throne Judgment which occurs at the expiry of the Millennial Reign of Christ(Rev.20:11-15). Those who lived and died in the Millennial will be resurrected and be judged at the White Throne Judgment. In chronological order, the book of Revelation should end with the White Throne judgment. But a good piece of literature contains flashbacks, parentheses, periscopes, etc. Rev.21,22 are a periscope on the 1,000 year reign of Christ in Rev.20 just as Rev.17-20 are a periscope on the seventh Bowl judgment in Rev.16:16-21. The New Heaven And The New Earth is not different from the Millennium, the 1,000-year reign of Christ. The Heavenly Jerusalem does not appear after the millennium but at its beginning and is contiguous at its base with the Fourth and Millennial Temple on the renovated Mount Zion on the new and earthly Jerusalem. It will be the abode of the resurrected saints in the Millennial. From there, the saints, kings and priests of Christ shall go and minister to and reign over the millennial earth-dwellers who are living in their mortal bodies.