Preterism is something that just doesn't pan out in my view. When it was probably written is based on the research of scholars who believe that prophecy is something that's written after the events take place and interpreted in that environment. Although Preterism is popular among a number of scholars, I find it untenable, personally, and believe it runs into a number of brick walls. In fact, one of my most frustrating email exchanges with a person of another belief system than myself was with a Preterist. Since they believe that all prophecies have been fulfilled, including the prophecies laid out in Matthew 24 and the book of Revelation, they must go through a number of gyrations to find fulfillment of things not yet fulfilled.
As an example, both Jewish and Christian eschatology speak of a time when Judah, under attack from a coalition of its neighbors (a situation that could only occur now), suffers almost total defeat. But, at the last minute, the Messiah, or Yahweh, appears, saves the remaining Jews and destroys their enemy. As the Psalmist puts it: “They have said, Come, and let us cut them off from being a nation; that the name of Israel may be no more in remembrance.For they have consulted together with one consent: they are confederate against thee.” (Psalm 85)
This is something that’s happening now. Not even Nebuchadnezzar dreamed of wiping Israel out as a nation. The present-day neighbors of Israel do, however, and hardly a month goes by without a major call for Israel’s destruction. “Edom, and the Ishmaelites; of Moab, and the Hagarenes; Gebal, and Ammon, and Amalek; the Philistines with the inhabitants of Tyre;Assur also is joined with them: they have [lent their strength to] the children of Lot.”
Some may seek to find fulfillment in the massive attack of the Romans, which scattered Judah to all nations of the earth; however, the Romans were not Judah’s neighbors. When Ezekiel writes of this great despot that will come down on Judah, he specifically lays out what will happen:
After many days thou shalt be visited:in the latter years thou shalt come into the land that isbrought back from the sword, and is gathered out of many people, against the mountains of Israel, which have been always waste: but it is brought forth out of the nations, and they shall dwell safely all of them.Thou shalt ascend and come like a storm, thou shalt be like a cloud to cover the land, thou, and all thy bands, and many people with thee. Thus saith the Lord God; It shall also come to pass, that at the same time shall things come into thy mind, and thou shalt think an evil thought: And thou shalt say, I will go up to the land of unwalled villages; I will go to them that are at rest, that dwell safely, all of them dwelling without walls, and having neither bars nor gates to take a spoil, and to take a prey; to turn thine hand upon the desolate places that are now inhabited, and upon the people that are gathered out of the nations, which have gotten cattle and goods, that dwell in the midst of the land.
This is something that Preterism (and JW eschatology) is helpless to explain. Ezekiel calls him “Gog” and John calls him “the Beast.” This great force will move swiftly until it gets to Israel; then the power of God will be brought to bear. Ezekiel speaks directly to this man and tries to warn him, but he knows, like Pharaoh of old, that Gog will harden his heart. “And I will send a fire on Magog, and among them that dwell carelessly in the isles: and they shall know that I am the Lord.So will I make my holy name known in the midst of my people Israel; and I will not let them pollute my holy name any more: and the heathen shall know that I am the Lord, the Holy One in Israel.”
Some people think this portends the great battle at the end of the Millennium, but there are a number of reasons to believe this is not the case. First, it refers to an event in the “latter years,” or the latter days. Also, the Lord said to him, “Art thou he of whom I have spoken in old time by my servants the prophets of Israel, which prophesied in those days many years that I would bring thee against them?” The prophets have always spoken of the Antichrist that would come just before the Second Coming of Christ. The battle of Gog and Magog at the end of the Millennium will be seen as a mere continuation of rebellion against God. But the Gog of which Ezekiel writes is someone who comes to war against those who have been gathered from the nations and have returned to their promised ancestral homeland. The Gog at the end of the Millennium will try to again bring force against God’s people, but by then there will be no Jerusalem filled with Jews, and the battle’s duration will be very short. In the battle of which Ezekiel speaks, known to Christians as Armageddon, it will take place over a longer period of time. It will take seven years to burn the munitions and to bury Gog’s dead.
At the end of the Millennium, there will be no need to bury anyone, because they’ll be vaporized, judged and resurrected in the resurrection of the unjust.
More references relating to this time: Psalms 83, 85; Zechariah 12-14, Revelation 11, which also speaks of a new temple at Jerusalem and two prophets who will be raised up to battle the Beast and the False Prophet.
There are many prophecies that have not yet been fulfilled and many that are in the process of being fulfilled. Preterism sweeps all this under the rug and presses for exegeses that seek to find fulfillment in and before the coming of the Savior.
Zechariah explains exactly how the Second Coming of Christ will be, and it's completely different from how the Governing Body imagines it. It's also a completely unfulfilled (as yet) prophecy.

.