The next event on God's calendar will be the end of the Church Age, at which time all born again believers will be removed from this earth via the Rapture (catching away - Jn. 14:1-6; 1 Cor. 15:50-53; 1 Th. 4:13-18), there will remain three groups of people: Jews who failed to trust in Jesus, Gentiles who failed to trust in Jesus, and, believe it or not, an organization known as the Church! These are they that call themselves Christians, but they do not recognize His authority, nor would they allow Him to even be a member (Rev. 3:14-22)!
Following the Church Age, there will be a seven-year period known by three names: 1. "Daniel's Seventieth Week" (Dan. 9:24-27); 2. "The Time of Jacob's Trouble" (Jer. 30:7); and 3. "The Tribulation (Mt. 24:3-29; Rev. Ch. 6-18). During this time, millions will be martyred for refusing to deny Christ (Rev. 7:9-17)!
After the seven-year Tribulation has been fulfilled, Jesus Christ will return to this earth, only this time, He will not come as "The Lamb of God," but He will be known as "The Lion of the Tribe of Judah - (Rev. 5:5)! He will judge the nations based upon how they treated His brethren (Israel)during The Tribulation (Mt. 25:32-46). Those who were kind to Israel will be permitted to enter into His Millennial Kingdom, during which, Satan will be bound and will not have any influence over mankind (1000 year rule on this earth - Rev. 20:1-6). Following the Millennium, Satan will be freed to lead mankind in a rebellion against Christ. He will gather the nations of the world into his army and will surround Israel and their Messiah (Rev. 20:7-8). God will send fire down upon them, and they will all be killed (Rev. 20:9).
After Satan is cast into the Lake of Fire (Rev. 20:10), the dead will all be raised to stand before the Great White Throne, to be judge (Rev. 20:11-15). Although their lives will be judged and found guilty of sin "out of the books according to their works," there still remains one "book" which is the basis for each person's eternal destiny: "The Lamb's Book of Life" (Rev. 13:8; 21:15). If their name is not written in it, they will spend eternity in the Lake of Fire. If it is there, they will have trusted in the "Lamb"; they will have trust in Jesus Christ, and they will spend eternity with Him, on the New Earth (Rev. 21:1 - 22:17)! Christ's last warning for people to repent and turn to Him is found in the last verse of the Book of Revelation:
He which testifies of these things says, Surely I come quickly. Amen. Even so, come, Lord Jesus.