Adam Clarke on Isaiah 65:17

I create new heavens and a new earth - This has been variously understood. Some Jews and some Christians understand it literally. God shall change the state of the atmosphere, and render the earth more fruitful. Some refer it to what they call the Millennium; others, to a glorious state of religion; others, to the re-creation of the earth after it shall have been destroyed by fire. I think it refers to the full conversion of the Jews ultimately; and primarily to the deliverance from the Babylonish captivity.