True. The dead in Christ number will be fulfilled, when the Lord returns to earth to avenge their blood. The number of all the saints, dead and alive on earth, will be fulfilled in the air.
Mar 13:20
And except that the Lord had shortened those days, no flesh should be saved: but for the elect's sake, whom he hath chosen, he hath shortened the days.
1 Th 4:15
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: 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.
That's when the fulness of all nations entering into the saved Israel of God, both the dead and alive, will be fulfilled at the Deliverer of Sion's return to earth.
Rom 11:25
For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the nations be come in.
Rom 11:26
And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob: For this is my covenant unto them, when I shall take away their sins.
The fulness of the dead in Christ in heaven, is no doubt the majority of all God's saints, but is not all of God's saints. All of God's saints at the hour of the Lord's return will be united altogether with Him in the air.
False.
Jde 1:14
And Enoch also, the seventh from Adam, prophesied of these, saying, Behold, the Lord cometh with ten thousands of his saints,
After meeting in the air, the Lord and His saints cometh to the earth, not departeth to heaven. They must still reign on the earth with the Lord for thousand years.
I really don't understand why some Christians prefer the resurrected saints ruling over the earth from heaven, rather than with the Lord on earth, even as Scripture says:
Rev 5:8
And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation; And hast made us unto our God kings and priests: and we shall reign on the earth.
True. The Mt Sion in the air: the fulness of all the resurrected body of Christ from righteous Abel and OT saints, to the last remaining NT saint alive on earth.
Separating Jew and Gentile, or even male and female, in the body of Christ on earth, and among the dead in Christ in heaven, is Judaizing heresy.
Tit 3:10
A man that is an heretick after the first and second admonition reject; Knowing that he that is such is subverted, and sinneth, being condemned of himself.