It is not a likely scenario. However, purely as idle musing...
What is published in The Watchtower is viewed by many Witnesses as the very words of Almighty God. The directives of the Governing Body are viewed as "Law" by many/most Elders. The Society has been very adroitly conditioning its followers to accept its interpretations unhesitatingly. Those who are viewed as "strong" Witnesses are those who question nothing.
The Society would first need to prune the Witness ranks of people who would vocalize their doubts regarding the Society's teachings and directives. The silly interpretation of the "Generation" would be followed by other such nonsense designed to remove independent thinkers. The Society would also need to pare the number of "weak" (nominal) Witnesses who could derail the scheme by their reluctance to follow the Society's every command.
The remaining Witnesses would be conditioned over a period of time to accept the idea that faithful death is preferable to life in "Satan's System of Things." Watchtower articles would revisit such scriptures as Psalms 116:15 ("Precious in the eyes of Jehovah is the death of his loyal ones.") and Luke 9:24 ("For whoever wants to save his soul will lose it; but whoever loses his soul for my sake is the one who will save it.")
Then, when extreme world conditions warrant it (war, pestilence, famine), an announcement would be made that all Witnesses (and only Witnesses -- the Faithful--) would be meeting on a specific day for a most special declaration of New Light from the Governing Body.
On that day, the CoBE would read an official letter from the Society stating that 'the Faithful Slave now understands that the Great Crowd's coming out of the Great Tribulation (Rev. 7:14) will occur today!!! The New Light given by Jehovah is that the "New Heavens and New Earth" of Revelation 21:1 are literal and already existing, and that Jehovah's people will be spared the evil coming upon the entire inhabited earth by being "transferred" as was Enoch. "And Enoch was no more, for God took him."!!! (Gen. 6:24).
Game over.
My speculation (based solely on my relatives and the people in the congregation I last attended): 20% of current Witnesses would drink...