Yes , agreed !
But I have one question. When you say 'in the flesh 'do you mean in the flesh as a human being or do you mean 'in his resurrected body '? For Christ shall rule during the millennium.
I do believe there to be a difference.
I mean that God the Father shall be an advent via a man in the flesh who obtains the same kind of spiritual union with Jesus Christ as Jesus Christ obtained with His Father. He will be an advent of Messiah and be what Acts 3:20-23 calls the 'prophet like unto Moses' who gathers all the 12 tribes of Israel from out of exile and establishes them again as a sovereign political power in the world. This is the one to whom the scepter departs Judah and goes to in the last days (per Gen 49:1,10) and is also the 'shepherd and stone [king] of Israel' who comes from the House of Joseph (per Gen 49:22-24).
As I read all of the prophecies of the Bible, Quran, Doctrine and Covenants (LDS revelations of Joseph Smith) I see that there are three distinct Messianic advents. Jesus as the Son, Adam as the Holy Ghost and then a third advent I call the Shiloh Messiah as the Father. The tribes of Israel these advents are from are Judah, Ephraim and Joseph respectively.
This last individual actually shall have spiritual union with Jesus and Adam and represents the redeemed Adam (Man) when his son Seth (Son of Man) restores Him to health and puts Him back upon His throne. Seth is God's Christ as referred to in Revelation 12:10.
Thus, the advent of the Father is the resurrection of both Jesus and Adam in union. So, by way of implication, the return of Jesus Christ is via a new advent of Deity by way of a man from the House of Joseph. The implication here is (spiritual) resurrection is a process of at-one-ment between a willing/worthy man alive in the flesh at the time and the personage of Deity who shall manifest through him.
And, as Adam in the advent of the Father, Christ shall reign for 1,000 years. This man from the House of Joseph is the first of a dynasty that shall rule for 1,000 years. He does so via spiritual communication (revelation) from 'the true and living vine'. So, if you are looking for Jesus to rule and reign for 1,000 years in his immortal spiritualize person, you are absolutely correct. You just also need to consider the fact that there shall be a new tabernacle through which He shall manifest Himself. And, that tabernacle shall be Shiloh Messiah from the House of Joseph. Hope that clears things up. And pardon the redundancy.