The feedback you shared reflects a typical dispensational view that turns New Earth passages into millennial passages. For instance, you referenced Isaiah 65 and the Millennium, yet Isaiah 65 specifically says it’s talking about the New Earth.

The central fact is that the resurrection will happen, and we will live forever with Jesus on the New Earth. That’s good news and should unite us all in our theology!  

Question from a reader: After all the things done to the earth during the Tribulation, what is going to be left for Jesus to rule and reign over for 1,000 years? Revelation says a third of the rivers, a third of the oceans, a third of the animals, and a third of the earth itself will be destroyed. Are we going to spend the first 500 years cleaning everything up?

Randy Alcorn talks about Isaiah 65 and how it's talking about both the New Earth and the millennium kingdom. This video clip was excerpted from Randy's Eternity 101 DVD class.

In October of 2012 Randy Alcorn was interviewed by Dr. John Akers at The Cove in Asheville, NC.In this clip, Randy shares some thoughts on how to discern which period a passage is talking about. He uses Isaiah 60 and 65 as examples.

... whatever He does will be exciting.

If you are a believer in Christ, once you leave this life in death or at Christ’s return, you will never suffer from the curse, death or suffering or any disease, including diabetes.

The millennium is an interesting subject. It’s also a theological lightning rod, one which I didn’t want to be a center of attention in my book Heaven.