This earth is the testing ground to see who will receive eternal life through faith in Jesus. Right now during the age of grace it is the testing of the gentiles to see who will believe in Jesus by faith and is for the bride and tribulation saints to enter heaven. The problem with this age is people are confused by all the denominations so you have division of the people. I think last count was something like 33,000 denomination.

Once this covenant which is the age of grace comes to an end then Jesus and the saints come back to earth to bind Satan and his cohorts. Once Satan is removed from earth the new covenant will go into effect and the people will have a single denomination which will be to follow the law which they will be able to do with Satan removed from earth. So you will have a people who accept Jesus as savior and follow the law for holiness as the shekina glory will be dwelling in the rebuilt temple. Those born on earth will then again have to believe by faith in Jesus just as gentiles have for the last 2000 years.

The earthly kingdom will be davidic/levitic. The heavenly kingdom will be melchelzedek order where those who have been tested will dwell in the higher melchelzedek order kingdom. Once the jues and surviving armeghedon gentiles have finished their faith in Jesus testing after the millennium then Jesus will create a new heaven and new earth where all will be kings and priests in a new melchelzedek order world

Again davidic/levitic means separation of kingship and priesthood. The goal is to become melchelzedek order kings and priests but it can’t happen on this earth because this earth is simply the testing ground and is the wrong realm to be a melchelzedek order kingdom....this earth is always described as “less” than the heavenly....therefore heaven is melchelzedek order which is the combination of the kingly and the priestly and the earth will be davidic/levitic meaning the separation of the kingship and priesthood. Two will have dominion one the earthly king and the other the earthly high priest to lead and guide the people to salvation through Jesus.