Part of what was revealed in that manger in Bethlehem was the truth that God never intended to destroy the earth. He, instead, took on the same earthly substance from which He created the First Adam (while remaining fully God)...in order to be the ultimate sign to us that heaven and earth shall remain and be in union forever through Christ! Jesus didn't come to fix God's great big, creation mistake! He came to fix ours! The Gospel is all about Love, Redemption, Reconciliation, and RESTORATION...not the false narrative that Jesus was too weak to finish the job or that God's ultimate intention for earth was ever condemnation and destruction!
Luke 2:14 "Glory to God in the highest, and on earth peace, good will toward men." Let that sink in!
In order to destroy the earth, after the Incarnation, He would have to literally destroy Himself...which is IMPOSSIBLE (since He Himself is God embodied in a glorified, EARTHEN vessel)! The Incarnation cannot and never will be undone! His Divinity and Humanity remain forever inseparable! The Resurrection proved that He is the INDESTRUCTIBLE God-Man, the Prototype Son, and the Firstborn among many brethren!
If you are wondering about what Jesus meant when he said, "Heaven and Earth will pass away" and want a proper definition of "A new heaven and a new earth", you need to look no further than what every First Century Jew understood when they heard these phrases in their historical and cultural contexts.
The Temple and Jerusalem were considered to be the place where heaven and earth met...and were referred to as "Heaven and Earth". Noah's Ark, Jacob's Ladder, The Tabernacle and Ark of the Covenant, David's Tabernacle, and Israel's Temples all foreshadowed the New Covenant Temple (JESUS- The "Place" and eternal consummation of the whole "Heaven and Earth" reality).
While speaking of His Body, Jesus declared..."Destroy this Temple, and in three days I will raise it up again." He DID just that...along with including ALL of mankind in this New Covenant Temple reality. Belonging is a given. Participation is a choice. "God was in Christ reconciling THE WORLD to Himself"!
He also destroyed the Old Covenant Temple and Jerusalem in 70 A.D., and abolished its priesthood along with their ceremonial practices (i.e.- The "elements" which Peter prophesied would be destroyed by fire).
"Know ye not that ye are the Temple of God?" The Church in Christ is The New Heaven and New Earth...and The New Jerusalem...which John saw coming DOWN...not going up!
Jesus is the Sure HOPE for all mankind...and planet Earth!
Thy Kingdom come, Thy will be done, on earth (Which Ecclesiastes declares... "Remains forever") as it is in heaven! See Matt. 6:10 and Ecc. 1:4.
Of the increase of His government and peace, there shall be no end. See Is. 9:6.
The meek shall inherit the earth and unto Him there shall be glory in the church by Christ Jesus throughout all ages, world without end. Amen! See Matthew 5:5 and Eph. 3:21.
All creation groans and travails not for its own destruction, but for the manifestation of the sons and daughters of God! See Romans 8.