Even if Armageddon comes as late as 2075, as David Splane indicated,
The fact is when all the GB men today are dead and gone replaced by new men at the helm of the Watchtower Corporation kingdom, newly twisted up doctrines will most likely occur.
You can bet on it.
The overlapping generation doctrine was created to uphold and keep alive 1914, which in itself has no scriptural support, 1914 in itself was an apostate false doctrine.