The Holy Spirit may work in the same capacity as he did with the OT saints prior to indwelling believer's. You're gonna have a 144,000 servants of God and two witnesses prophesying and all of God's wrath being poured out.
If those two witnesses will be sent here by God specifically for the purpose of prophesying and are given power to perform those plagues. That said, they are not going to have be convinced about God, because He's the One who will have sent them. For they are referred to as the two olive branches and the two lamp stands that stand before the Lord of the earth.
As I have posted before, God has made a definite distinction between the church and the great tribulation saints made obvious to those who search out God's word. The use of the word "Church" and the subsequent absence of the word "Saints" within Revelation 1 thru the very end of Rev.3 and likewise the use of the word "Saints" and the absence of the word "church" from Rev.4 onward is all too obvious.
As I have stated before, the very fact that the elder is introducing this group in white robes that no man can count, referred to as those saints who come out of the great tribulation and that he is asking John who they are and the fact that John doesn't know, makes it obvious that this group is not the church. I believe that this group will be made up of people who were professing Christian's but will have been living according to the sinful nature when the Bridegroom appears and they will miss the boat. Jesus warns all believer's of this very concern in Lk.21:34-36. They will also be made up of people who heard the gospel, but never made a decision for Christ and people who will have heard the warnings but like those in the days of Noah, didn't take it seriously.
This actually supports my claim regarding the distinction between the words church and saints within Revelation. Within those fourteen books, the word church and saints is used interchangeably, i.e. both words are used within the text. Not so here in Revelation. As I have pointed out in previous posts, if the word church and saints were both used in all chapters within Revelation, then there would be no foundation for this claim. But the fact that there is a separation of the two and we are introduced to the GTS in chapter 7, it becomes obvious that this group is not the church.
And the above brings us right back to the crux of the problem of mid and post trib believer's. From this present point in time, until Christ returns to end the age to establish his millennial kingdom, the wrath of God stands in the way. The word of God makes it very clear that those who are in Christ are not appointed to suffer his coming wrath and that Jesus rescued us from it. Since Jesus has already suffered the wrath that we deserve as a result of our sins, it would not be in God's nature to send his church through this coming wrath. Taking into consideration the severity and magnitude of this coming wrath and it being world-wide, the church cannot possibly go through it, ergo, the church must be removed prior to God's wrath being poured out.
Regarding the Lord's appearing and our being gathered to Him, he said the following:
"But as for that day or hour, no one knows, not even the angels in heaven, nor the Son, but only the Father. Be on your guard and stay alert! For you do not know when the appointed time will come.
It is like a man going on a journey who left his house, put each servant in charge of his own task, and instructed the doorkeeper to keep watch. Therefore keep watch, because you do not know when the master of the house will return—whether in the evening, at midnight, when the rooster crows, or in the morning. Otherwise, he may arrive without notice and find you sleeping. And what I say to you, I say to everyone: Keep watch!”
In the scripture above, it is clear that the Lord's return for us is imminent, that being said, if our gathering was to take place when the Lord returned to the earth to end the age, it would not be imminent and that because there would be every kind of sign imaginable, such as the Antichrist making his seven year covenant with Israel and his setting up of the abomination 3 1/2 years later, as well as all of the seals, trumpets and bowl judgments.
The belief of the church being put through the wrath of God stems from 1). those who don't understand the purpose and severity of God's wrath and 2). not understanding the difference between common trial and tribulation, opposed to God's direct and specific wrath. This coming wrath is going to decimate the population of the earth and dismantle all human government. I continue to use this example, that with just the 4th seal and the 6th trumpet alone being a fourth and a third respectively, the fatalities will be approximately 4.5 billion people. People have no idea about the horrors that are about to take place on this earth. With this in view and the Lord's warnings for us to always be watching, the Lord's promise to come again and take us back to the Father's house will be prior to the outpouring of his wrath. Then we can do what Paul told us to do regarding our being gathered, which is to comfort one another with these words. And to be gathered and removed from the earth prior to God's wrath is indeed a blessed hope.