Believers are with Christ in heaven after death, and He brings them with Him when He returns. But for all believers who are left alive at His coming again, they are surrounded by the enemies of Christ and His Church (holy kingdom) on earth, and just before the fire of God comes down to destroy them all, believers are caught up to meet the Lord in the air until the wrath of God by fire is over. Then all those from heaven who came with the Lord, believers resurrected bodies, and all who are still alive on earth at His coming, will be changed to immortal and incorruptible at His coming. Then only those who are with Christ (believers) will be in the age of eternity to come to the new earth, where we will be with Christ forever. Not for one thousand years, but forever. Here is a picture for you of things that come to pass with the coming of Christ on the last day of this age.
Re 20:8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
Re 20:9a And they went up on the breadth of the earth, 9:b and compassed the camp of the saints about, and the beloved city:
1 Thessalonians 4:14 (KJV) For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.
1Th 4:16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
1Th 4:17 Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
Re 20:9c and fire came down from God out of heaven, and devoured them. (Gog & Magog)
1Co 15:51 ¶ Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
1Co 15:52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
1Co 15:53 For this corruptible must put on incorruption, and this mortal must put on immortality.