After the transformation of the earth will come this New Jerusalem. It will be the haven for the house of God in the New World, meaning those who are of (or adopted into) “the seed of Joseph” and the “house of Israel.”
In the last days, God will gather his people no matter where they had been scattered. Those in the New World will come to the New Jerusalem. Those scattered in the Old World (the ten tribes are associated with the “north countries”) will return to the Old Jerusalem—built anew after its destruction.