You may not know this, but Jerusalem and her Temple were referred to as "Heaven and Earth" by the Jewish people during and prior to the First Century. An understanding of this, along with a historical understanding of what happened in and around 70 AD, will allow you to read the New Testament through a completely different lens than Dispensationalism has allowed.
I submit to you that there are many present "New Heaven and New Earth" realities which have been untapped due to the error of many who have mistaken historical events for imminent or future apocalyptic happenings. The answer to the question, "Who is God's Temple and New Jerusalem now?", will help you to unlock the mystery of "The New Heaven and New Earth". Christ in us is the Hope of Glory!
The following verse will also come in handy...when you realize that "this generation" was THAT generation (The Generation of Jesus' original audience).
Mt. 24:34 "Truly I say to you, this generation will not pass away until all these things take place."
Additional note: This is NOT "replacement" Theology.
It has always INCLUDED both "Jew & Gentile"..."The ONE NEW MAN"!