Are you a believer in Anglo-Israelism? In any case, there is ZERO scriptural proof of ANYTHING you just said. Books, Chapters, and verses, please, if you want anything you said to carry any weight at all..
The Gentiles will be fellowheirs, but certainly not in the commonwealth of Israel. That's absurd. The Israelites (and those few Gentiles during Acts) who have won the race and will be in the New Jerusalem with celestial bodies, will be the Bride. The Gentiles in the Highest Heaven, who are the actual Body of Christ, (Eph 5:30 " For we are members of his body, of his flesh, and of his bones.") will, along with Christ, make up the Groom since, as His actual Body, we go where He goes. We are told to put on the "New Man" (Eph 4:24). The only place a man can be called a woman (Bride) is in our present totally immoral society.
The 12 never did begin the Great Commission, which was given ONLY TO THE 12. They were too busy during Acts trying to get Israel tio repent and accept Christ as their Messiah, which was the only purpose of everyone during Acts. This was because Christ said in Mt 23:39 and other places that He would not return and, therefore, would not set up their Kingdom until Israel, as a nation, accepted Him. The only Gentile ministered to by any of the 12, during the Gospels or Acts, was Cornelius in Acts 10. The 12 will, though, some day, go to the ends of the earth and evangelize the world. Although mission work is theoretically good, it has absolutely nothing to do with the Great Commission. There is nothing in the scriptures to indicate that anyone except the 12 would be doing the Great Commission.
James knew that no tribe was lost, when he addressed his Book, "to the twelve tribes which are scattered abroad". Scattered, Yes. Lost, No. Paul didn't think there were any lost tribes, Ac 26:7. Christ didn't think they were lost, Mt 19:28. No one that believes their Bible thinks they are lost - only those that have been deceived by false teachers, like the Armstrongs or the Mormons. So, you say that Israel (the 10 tribes) are lost. The only way they were lost was due to unbelief and that's a main reason for Christ's ministry. If Israel were truly physically lost, are the following verses possible? Of course not!! In every instance I found, the term. "Israel" in the NT, when referring to a "people", referred to the 12 tribes and not to the 10, as it did in some of the OT.
Mt 10:6
But go rather to the lost sheep of the house of Israel. (said to the 12)
Lk 1:80
And the child grew, and waxed strong in spirit, and was in the deserts till the day of his shewing unto Israel. (John the Baptist)
Jn :31
And I knew him not: but that he should be made manifest to Israel, therefore am I come baptizing with water. (John the Baptist)
Ac 2:22
Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know:
Ac 2:36
Therefore let all the house of Israel know assuredly, that God hath made the same Jesus, whom ye have crucified, both Lord and Christ.
Ac 3:12
And when Peter saw it, he answered unto the people, Ye men of Israel, why marvel ye at this? or why look ye so earnestly on us, as though by our own power or holiness we had made this man to walk?
Ac 4:8
Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel,
Ac 4:27
For of a truth against thy holy child Jesus, whom thou hast anointed, both Herod, and Pontius Pilate, with the Gentiles, and the people of Israel, were gathered together,
That's enough. All these referred to their present day or earlier NT times. There are about 12 more that I could quote. Anyway, these are plenty of proof that, when the term, "Israel" is used in the NT, it means 12 tribes and not 10, with no exceptions that I could find. Sort of like the term, "Jew" in the NT. In most (or, all) places, "Jew" means a member of one of the 12 tribes of Israel, not a member of the tribe of Judah. It may, in a few instances, mean a resident of Judea.
Issac Newton was also an alchemist, which would put him in a class of anti-science fools, believers in non-Biblical spiritualism, and deluded charletons.