Revelation 20:7ff is still in the future, at the end of Jesus’ reign over the kingdom which He established when He sat down at the right hand of the throne of God. Revelation 20ff shows the events that occur when that reign is completed. He returns to rescue the church and to judge all of the world. Here’s the text:
“7When the thousand years are completed, Satan will be released from his prison, 8and will come out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together for the war; the number of them is like the sand of the seashore. 9And they came up on the broad plain of the earth and surrounded the camp of the saints and the beloved city, and fire came down from heaven and devoured them. 10And the devil who deceived them was thrown into the lake of fire and brimstone, where the beast and the false prophet are also; and they will be tormented day and night forever and ever. 11Then I saw a great white throne and Him who sat upon it, from whose presence earth and heaven fled away, and no place was found for them. 12And I saw the dead, the great and the small, standing before the throne, and books were opened; and another book was opened, which is the book of life; and the dead were judged from the things which were written in the books, according to their deeds. 13And the sea gave up the dead which were in it, and death and Hades gave up the dead which were in them; and they were judged, every one of them according to their deeds. 14Then death and Hades were thrown into the lake of fire. This is the second death, the lake of fire. 15And if anyone’s name was not found written in the book of life, he was thrown into the lake of fire.”
Christians cannot be “full preterist” because everything in the Bible is not yet fulfilled. The return of Jesus, the final judgment, the futility, the sin, physical death, and the pain will be replaced with life eternal in the new heaven and earth. That’s all still future and we believe it by faith.
Anyone who says every future in the Bible points to 70 a.d. is lost and as faithless as a group of Saduccees.
“16But avoid irreverent and empty chatter, which will only lead to more ungodliness, 17and the talk of such men will spread like gangrene. Among them are Hymenaeus and Philetus, 18who have deviated from the truth. They say that the resurrection has already occurred, and they undermine the faith of some.…” 2 Tim 2:16ff.