Splane is setting up the stretch of "this generation." Just as sure as they went from the 1914 generation being people old enough to recognize the sign all the way to the 1914 generation just being born by 1914, so this overlap portion will go from contemporaries that significantly overlapped their adult lives as anointed (basically, they knew each other) right down to babies born just before (10 minutes before) the first group completely died to become anointed later.
They are going to drop the "contemporary" word that they used to condition people to the silly overlap idea.
They like using Freddy Franz in their example because he was "of age" in 1914 and lived until 1992, a year that all of today's Governing Body were born before. They give the impression that the end will come before the current GB are all dead. But I imagine as a kicker, they will put someone born around 1990 on the Governing Body in 15 to 20 years (or less) when this stupid doctrine is getting stale and they will start making it seem like the end will come in that GB member's lifetime.
As a matter of opinion, I imagine they might already have this in mind to do somewhere close to 2034. And I don't think they will name an end date for Armageddon to have occurred, but will name a beginning date for THE GREAT TRIBULATION to have started. They will declare that it did start just like they declared that Jesus did show up on time invisibly.