Coming from a historicist postmillennial perspective, I agree with the Confession's statement that the Pope is Antichrist. I also agree that Christ came in judgment on Jerusalem in 70 AD. The conversion of the Jews, as predicted in Romans 11, however, is yet to be fulfilled.
The main thing is, Christ's mediatorial kingship is ongoing now, and therefore, the victory already belongs to him having conquered sin and death at the cross and ascended to the right hand of God at the Resurrection, and the fruits of that victory are becoming more and more manifest. Heb. 2.8.
I believe the key book in the Bible which accounts for the Puritan and Reformed eschatology of victory is the Psalms. I have never met a premillennial or dispensational Psalm-singer (or at least I haven't met one who stayed that way for long). The Psalms are full of Christ in every office, including that of King (Ps. 2, for one example out of many; see also WLC #43-45). It's impossible, or so it seems to me, to sing the Psalms and not be impressed with Christ's Lordship over the nations as well as individuals. The Puritans and Presybterians (and many Baptists!) of the Reformation sang the Psalms exclusively and hence their minds were filled with these things.
Hence, we have a model prayer written for us in the Directory for Public Worship which runs in part like this:
"To pray for the propogation of the gospel and kingdom of Christ to all nations; for the conversion of the Jews, the fulness of the Gentiles, the fall of Antichrist, and the hastening of the second coming of our Lord; for the deliverance of the distressed churches abroad from the tyranny of the antichristian faction, and from the cruel oppressions and blasphemies of the Turk; for the blessing of God upon the reformed churches, especially upon the churches and kingdoms of Scotland, England, and Ireland, now more strictly and religiously united in the Solemn National League and Covenant; and for our plantations in the remote parts of the world: more particularly for that church and kingdom whereof we are members, that therein God would establish peace and truth, the purity of all his ordinances, and the power of godliness; prevent and remove heresy, schism, profaneness, superstition, security, and unfruitfulness under the means of grace; heal all our rents and divisions, and preserve us from breach of our Solemn Covenant."
