First of all lets establish, who lived and reigned with Christ and where was it. Notice it says (past tense)
Scripture says the "souls" of them that were beheaded for the word of God. It says nothing about any bodies. Also, It does not place the reign upon the earth either. All of this has been interpted by man and not the scripture.
Second, what is a thousand years. Is it one day, one hour or is it really a thousand years of man's time. I really do not know, and doubt if anyone else's does.
Psa 90:4For a thousand years in thy sight [are but] as yesterday when it is past, and [as] a watch in the night.
2Pe 3:8But, beloved, be not ignorant of this one thing, that one day [is] with the Lord as a thousand years, and a thousand years as one day.
I think the Greek word for a "thousand" in Rev. is an indefinite amount of time.
3rd, What happened while Jesus was on the cross, He shook the earth, until the rocks rent, there was a darkness that came upon the earth, and most important, there was a confession that He was the Christ.
Mat 27:54Now when the centurion, and they that were with him, watching Jesus, saw the earthquake, and those things that were done, they feared greatly, saying, Truly this was the Son of God.
Mar 15:33¶And when the sixth hour was come, there was darkness over the whole land until the ninth hour.
When the end of time comes the Lord said:
Hbr 12:26Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven.
Rom 14:11For it is written, [As] I live, saith the Lord, every knee shall bow to me, and every tongue shall confess to God.
Now, as there will be a great fear come on this earth at the end of time when the sun turns dark and the earth shall quake, all shall confess that Jesus is the Christ, but it will be too late for those who do not have Him on their bond.
The same was true when Jesus died, there was such a quaking and darkness that a fear came upon them that even him who pierced Him in the side, confessed that He was the Christ.
Jesus by dying overcome satan and sin. Satan could not stop him and through His death, He conquered over death Hell and the grave and we obtained the victory.
Rev 12:10And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night.
When did Salvation and Strength come to mankind. It was when Jesus died on the cross, that the victory was won. Now, after Jesus arose from the dead, there were others that arose with Him.
Mat 27:52And the graves were opened; and many bodies of the saints which slept arose,
Mat 27:53And came out of the graves after his resurrection, and went into the holy city, and appeared unto many.
They came out of the grave, after Jesus arose and went into that Holy city. If that is not a resurrection, then I am wrong.
1Cr 15:20¶But now is Christ risen from the dead, [and] become the firstfruits of them that slept.
Now Jesus tells us His eschatology:
Jhn 5:28Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,
Jhn 5:29And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.
I believe what Jesus said about the matter, it will be a quick work He will do when He comes. He will receive the church and pass judgement upon the world.
I believe the Millennium was spiritual and started at the cross.
No where but no where, does it say that Christ will reign upon the earth.
BBob,