At a time known only to God the Father, the Lord Jesus Christ will return bodily and in glory, receive His own, and establish His earthly thousand-year reign.
God will raise the dead bodily and judge the world.
The unsaved will be cast into the lake of fire to suffer eternal conscious punishment. The saved of all ages will be forever with the Lord.
God will rule over His Kingdom in the new heaven and the new earth for all eternity.