slimboyfat : The “millions” who were expected to survive Armageddon were currently unbelievers who would accept the truth in the new world in large numbers and never die.
Yes, slim, you've got that right. In the convention at Los Angeles in August 1923 Rutherford gave a talk on the parable of the Sheep and the Goats. This was reported on in the October 15, 1923 Watchtower (pp.307-314), the sheep were identified as those in Christendom who were sympathetic towards the Bible Students and their message. It says, on p.313 :
There is a large number of people in the denominational churches and outside of them who do not claim consecration, but who now see enough of the truth to convince them that the kingdom is at hand and who rejoice in the fact that the King is here. It is not at all unreasonable to conclude that there are millions now hearing about God’s plan of salvation who will pass through the time of trouble and never die, being amongst the first that will have opportunity for a trial for life everlasting.
An additional thought has occurred to me of the importance that it is no longer necessary for unconverted relatives and friends to die before the Great Tribulation in order to live in paradise. There have been a number of cases where a JW has murdered close relatives. There seems little doubt that the perpetrator was mentally unstable, but even so the thought that he was saving them from eternal destruction (as they would get a resurrection) apparently played a part in some such cases.