It must be more than a partial fulfilment if the Gentiles are already fellow-citizens with the saints and of the household of God, Ephesians 2.
Furthermore, the apostle in Galatians 4 applies the judgment and mercy oracles upon Jerusalem as being fulfilled in the separation of Jerusalem below and above. That separation has already been made and is a part of the ordinary constitution of things until the consummation; and from Hebrews 12 we learn that the establishment of the heavenly Jerusalem to which believers have come is the result of a cataclysmic shake up of the same nature with that which was foretold by the prophets.