@Stapler99, the WTS seems a trifle confused about who the great crowd are.
Consider that when the phrase occurs at Rev 7:9, the "great crowd" (or "huge number" in the Jerusalem Bible) are described as those who come out of the great tribulation.
WT 3/15/09: "The resurrected ones will be judged, not on the basis of sin inherited from Adam, but by what they themselves choose to do ... With upbuilding new information available and a life filled with good things, they will no longer be distressed by the bad things of the past. Those past experiences can be put out of their minds. The same will be true of the “great crowd,” who survive Armageddon. (So two separate groups then.)
WT 1/15/08: "Of course, while the resurrected ones will have much to learn from us, we will have many questions to ask them. They can fill us in on events that are mentioned in the Bible but not described in detail ... Faithful servants of Jehovah who have died—including those of the great crowd who die during the time of the end—will come forth to “a better resurrection.”(So the great crowd now includes those who died before Armageddon).
WT 1/1/07: "The apostle John saw this modern-day ingathering in vision. First he heard the announcing of the sealing of the final ones of the 144,000. Then he saw “a great crowd, which no man was able to number,” standing before Jehovah and Jesus, with “palm branches in their hands.” These “come out of the great tribulation” into the new world ... The antitypical Festival of Booths will reach its climax after the end of the Thousand Year Reign of Christ when they along with faithful resurrected ones are granted everlasting life. (Er ... so now "faithful resurrected ones" aren't part of the great crowd.)
WT 5/1/05: "Likewise, for us to receive Kingdom blessings, we must be alive in God’s new world, either as members of the great crowd of Armageddon survivors or as those resurrected from the dead." (Oh, it's one or the other).
WT 2/15/03: "In time, Jehovah’s organization began to focus attention on others in addition to Christ’s anointed followers. A notable development along these lines took place in the mid-1930’s. Before then, God’s people viewed the “great crowd” of Revelation 7:9 as a secondary spiritual class that would be associated with the 144,000 resurrected anointed ones in heaven—like bridesmaids or companions of the bride of Christ. But on May 31, 1935, in a discourse given at a convention of Jehovah’s Witnesses in Washington, D.C., U.S.A., it was Scripturally explained that the “great crowd” (“great multitude,” King James Version) refers to the “other sheep” who live during the time of the end." (So ... if you're alive during the time of the end -- which began in 1914 -- you're one of the great crowd, even if you die before Armageddon.)
WT 10/15/96: "Without doubt, the resurrection of the dead is a time of boundless happiness for those resurrected to life in heaven. But the happiness does not end there, for also promised is a resurrection to life right here on earth. Those resurrected will join an unlimited number who survive the end of the present wicked system. After viewing the small number who qualify for a heavenly resurrection, the apostle John was given a vision of “a great crowd, which no man was able to number, out of all nations and tribes and peoples and tongues.” What a happy time that will be when millions, possibly billions, come back to life here on earth!" (Uh, just a minute. So the great crowd actually includes the resurrected ones now?)
They're just not sure.
And don't you just love that phrase in the 84 WT cited by Leolaia: "When did the Fine Shepherd set out to bring together his other sheep? Many centuries later, yes, in this 20th century, according to the facts of the case." Facts. Facts?