What was God the Son about to do when He came before God the Father in the Revelation scene?
God the Son was about to return to earth and smite the Gentile empires that had existed for 2,600 years. He would destroy them, cause them to disappear, and then set up His eternal kingdom, a dominion that shall not pass away.
Les explains that this scene shows God the Son coming before God the Father as He is about to return to earth and smite the Gentile empires that have been on human history for 2,600 years. He is going to come and destroy them, and they are going to disappear from view. Then He sets up His kingdom, a dominion which shall not pass away—it is eternal. Les notes that this kingdom will be interrupted again when Satan is released for a little while, but then comes the new heaven and the new earth, and the kingdom continues into eternity. His kingdom is that which shall not be destroyed, where He has His rule and reign.