The New Heaven and New Earth isn't what you think it is.
If you haven't read Isaiah chapters 64-65 in a while, I suggest you go back and read them again, in context....(that is key)
Isaiah is speaking of a time in the future when great judgment would come upon God's people. Who were God's people?
Let's set some foundation before we get to the point.
Isaiah in chapter 64 when speaking of this future judgement that would make Jerusalem desolate says...
"Zion is a wilderness, Jerusalem a desolation. Our holy and beautiful temple, Where our fathers praised You, Is burned up with fire; And all our pleasant things are laid waste.... Isaiah 64:10-11
Then in chapter 65 we read more about the Jews and how they would continually anger God...
"I have stretched out My hands all day long to a rebellious people, Who walk in a way that is not good, According to their own thoughts; A people who provoke Me to anger continually to My face; Who sacrifice in gardens, And burn incense on altars of brick; Who sit among the graves, And spend the night in the tombs" Isaiah 65:2-4
He goes on to warn about what He will do to them...
"Behold, it is written before Me: I will not keep silence, but will repay—Even repay into their bosom—Your iniquities and the iniquities of your fathers together" Isaiah 65:6-7
He then goes on further to say what He will do to them in that day...
"But you are those who forsake the Lord, Who forget My holy mountain, Who prepare a table for Gad, And who furnish a drink offering for Meni. Therefore I will number you for the sword, And you shall all bow down to the slaughter; Because, when I called, you did not answer; When I spoke, you did not hear," Isaiah 65:11-12
He then goes further to speak about how in that day, His true servants (believers) would be taken care of by Him but how this rebellious people (the Jews) would struggle severely...
"Behold, My servants shall eat, But you shall be hungry; Behold, My servants shall drink, But you shall be thirsty" ...and on and on Isaiah 65:13
"You shall leave your name as a curse to My chosen; For the Lord God will slay you, And call His servants by another name;" Isaiah 65:15
"Because the former troubles are forgotten, And because they are hidden from My eyes." Isaiah 65:16
NOW TAKE NOTICE THE NEXT VERY NEXT VERSE...
“For behold, I create NEW HEAVENS AND A NEW EARTH;And the former shall not be remembered or come to mind. But be glad and rejoice forever in what I create; For behold, I create Jerusalem as a rejoicing," Isaiah 65:17
Did you catch that? In our modern bibles we have chapter breaks so sometimes we don't catch the flow. But in the original letter there were no chapter breaks.
Isaiah speaks the entire time about how his people (the Jews) would be destroyed, judged, starved, etc. He also speaks about the New people of God (the New Jerusalem) and how they would be created at this time and would be taken care of.
Notice the smooth transition and how Isaiah calls those new people "the new heavens and new earth"! It is clear as day.
The NHNE is the New Jerusalem/New Covenant people of God.
(Go and read the chapters without breaking them up and you can see exactly what I am saying)