Isaiah and others speak about a new heavens and a new earth, but he isn't referring to the new heaven and new earth which are described in Revelation chapters 21 and 22.
Which New Heaven and New Earth?
November 2nd
The Millennial Kingdom is what the Old Testament prophets referred to as "a new heavens and a new Earth," but it's not the new heavens and new Earth that John describes in Revelation chapters 21-22.