I have my doubts about the probability of full communion until Jesus Christ returns, to set all to right. Think the Assyrian or Eastern Orthodox would remain in communion with Rome (assuming they become in full communion in the first place) if Rome tried to change Her position on that very point?
I can't speak for the Assyrians, of course, but as far as the Orthodox are concerned the answer is — No! One bishop cannot interfere in the juristidciton of another bishop. A bishop can severe communion with another bishop if theological disagreement arises, but he can not "pull rank" on another bishop. The final authority in the church is a bishop; where a bishop is, the fullness of catholic and apostolic church resides.