When the numbers of the remaining annointed ones drops to zero, the WTS will have a mass exodus just as it did in 1975. The WTS will release their 'new light' at some point before this happens in order to buffer the effects of another unfulfilled prophecy.
However, I do remember that the Bible says that not all of the annointed would pass away in death. Some of them would be taken to heaven at the start of Armageddon. The fact that there are less than 8,000 left here on earth should be making some people at headquarters nervous.
It would be nice to know the birth dates of these annointed ones. Perhaps we can compare them to some insurance mortality tables in order to calculate how much time the WTS has left?