I believe when the heavens roll like a scroll is when the new heaven and new earth happpens.
Also that we are not the only sentient beings in the heavens that God has created.The heavens is liken to a garden, and earth is a seed planted in a garden by God.
Revelation 6:14
And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
Isaiah 34:4-6
And all the host of heaven shall be dissolved, and the heavens shall be rolled together as a scroll: and all their host shall fall down, as the leaf falleth off from the vine, and as a falling fig from the fig tree.
For my sword shall be bathed in heaven: behold, it shall come down upon Idumea, and upon the people of my curse, to judgment.
The sword of the Lord is filled with blood, it is made fat with fatness, and with the blood of lambs and goats, with the fat of the kidneys of rams: for the Lord hath a sacrifice in Bozrah, and a great slaughter in the land of Idumea.
God's sword being bathed is symbolism for water.The next verse then says his sword is filled with blood.
In the Isaiah verses you see spirit,water,blood.
The firmament in Genesis was called heaven.The Holy Spirit is a type of firmament dividing us from the waters below.The ones with the Holy Spirit are like the waters above the firmament.
The revealing of this is that the Holy Spirit is the kingdom of God coming down to earth,and God dwelling with man right now.
What once was will be again.there is nothing new under the sun.
The scripture is referencing the rolling of the heavens like a scroll as his word being proclaimed in the heavens and all those it passes through as being judged.A sword is symbolic of the word of God.
Why would his word be proclaimed in all the heavens if we are his only sentient creation in this universe?
God doesn't have to tell us there's more life out in the universe,but he does if you search out a matter.
Even if I believe that New Jerusalem is already here,I also believe that the power of the Holy Spirit will be unlike nothing we have ever seen before.
Most people believe that a physical kingdom will come down from the heavens,but I'm not so sure about that.
New wine,new song,New Jerusalem is all the same thing pointing to the finished work of Jesus, and his promise.
Revelations 6:12 And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
13 And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind.
14 And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
Isaiah 34:4 And all the host of heaven shall be dissolved, and the heavens shall be rolled together as a scroll: and all their host shall fall down, as the leaf falleth off from the vine, and as a falling fig from the fig tree.
Isaiah 34 has much spiritual language and foreshadowing of future events, perhaps new heaven and earth too, but reading through chapter 34 to the end of chapter 35 reveals that the immediate fulfillment is the Babylonian captivity.
The animals and bird in the land are referred to as the land has it's seventy year sabbath rest, and chapter 35 ends with the return of the remnant.
Also unmistakably in the context of Babylon is
Isaiah 13: 10 "For the stars of heaven and the constellations thereof shall not give their light: the sun shall be darkened in his going forth, and the moon shall not cause her light to shine."
There is another similar reference in Joel 2:
Joel 2:30 And I will shew wonders in the heavens and in the earth, blood, and fire, and pillars of smoke.
31 The sun shall be turned into darkness, and the moon into blood, before the great and terrible day of the Lord come.
This chapter however seems very much to speak of the new covenant and the destruction of Jerusalem following.
Notice "the great and terrible day of the lord"
Luke also predicts: "great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven" leading up to this time, so about the Revelations 6:12-14 passage I would conclude that some of this really happened in the destruction of Jerusalem, and some is apocalyptic language for total destruction.
The foreshadowing of the new heavens and earth may well be intended there too.