Never heard it put like this before. Hmm.
See, I think in the final eternal state those of us believers who have died and received glorified bodies need to be reigning over something mortal. If things are restored back to Adam's day, your theory makes perfect sense for the physical world. We obviously still have death but then again, maybe the lack of death applies only to us in the spiritual realm. Meanwhile the physical realm continues but restored back. Like you said, the righteous will live longer.
The battle of Armageddon is when the world will attack Israel for they have accepted Christ,for God sent them 2 witnesses to turn them to the truth,and the beast will persecute all people that hold the testimony of Jesus.
Jesus said,the Jews shall not see Him again,until they say,blessed is He that comes in the name of the Lord,which Jesus will save Israel from the world,and they will see Him,and the kingdom on earth will be restored to Israel.
Jesus and the saints will be in glorified bodies ruling over the people that are left that went against Israel,which the Bible says one sixth of them will remain,and they will be in the flesh.
The LORD shall be king over all the earth in that day,and there shall be one LORD,and His name one,and the glory of the LORD shall fill the earth.Nobody will recognize any God,or religious figure,but only Jesus.
People will not war with people,and animals will be plant eaters,and not eat meat,and not fight with each other,and a little child can lead a crocodile in one hand,and a lion in the other,and they will have no desire to hurt the child.
The people in the flesh have to go up year after year to worship the LORD at Jerusalem,and keep the feast of tabernacles.
Satan is bound in the bottomless pit for 1000 years,and at the end of the 1000 years is loosed from the pit where he stirs up the world,and they go against the saints,and God rains fire down on them,and devours them.
The people that Jesus and the saints rule over,took the mark of the beast,but God postponed their judgment until the 1000 years were expired.
The earth and heaven will pass away,and be no more,and Jesus said,I make all things new,and the former earth and heaven,will not be remembered,or come to mind,and angels,and the saints,will not remember anything prior to the New Jerusalem,which is a spiritual kingdom,for the old earth and heaven are associated with sin,and rebellion,and suffering,and the New Jerusalem will be a place where sin has never been,and sin will never be,and rebellion will never come up again,and the saints will have glorified bodies,and no one in the flesh there.