In the October 2019 WT p. 16, the WTS said "may" backing away leaving a gap to escape through: " During the great tribulation, the message that we proclaim will likely change. Currently, we are preaching the good news of the Kingdom and we are endeavoring to make disciples. But at that time, we may well deliver a message as hard-hitting as hailstones. (Rev. 16:21) We may proclaim the impending doom of Satan’s world. In time, we will find out exactly what our message will be and how we will deliver it. Will we use the same methods we have used for over a hundred years to accomplish our ministry? Or will we use some other methods? We will have to wait and see. In any case, it seems that we will have the privilege of boldly proclaiming Jehovah’s judgment message!"
2020 May WT p.15 "That symbolic hailstorm may take the form of a hard-hitting judgment message delivered by Jehovah’s people. It could be that this message provokes Gog of Magog into attacking God’s people with the intention of wiping them off the earth."
2023 June WT p.6 pp13 During the great tribulation, elders will need courage to obey instructions they will receive—regardless of the dangers involved. The instructions may relate to delivering a symbolic hailstone message and to surviving the attack of Gog of Magog.