Sooner or later reality impinges on a prediction. That's what happened when the people alive in 1914 died off. There followed a flurry of attempts to explain "Wha' Happen?"
Rutheford was confronted with the obvious fact that including the annointed of the 2000 years following the Christian foundation at Pentecost 33 there were most likely more than 144,000 annointed that lived and died. So, he made that number literal and created a new class "the great crowd".
When 1914 didn't produce the return of Christ so that every eye could see him they made the return invisible.
The Blood Transfusion detour can't be changed without a major-major schism.
The problem with a Israeli/Palestine peace agreement is that it would be too significant for them to ignore. In the world of diplomacy the conflict in the middle east has dominated policy and it has been the most sought after of peace achievements. It is the dominant cause of terror in the Western World. It involves Christians, Jews, and Muslims because Jerusalem is the place where Abraham offered up Isaac and Solomon built the temple. It is the place where Muhammed ascended to heaven and where Jesus was crucified. There is no other place on earth that is held in such reverence.
It is the intersection of the cultures of 4 billion people which is over half the population of the earth.
Every president from Eisenhower until now tried to get a comprehensive peace in that conflict. All they have been able to achieve is a little "piece" here and a little "piece" there - but NO PEACE.
Don't doubt for a moment that Obama is pushing for this. As soon as Kerry achieves it Obama will of course step in and take all of the credit. If Kerry fails - Obama is at a safe distance from the effort so he can avoid a perception of failure.
How could the Watchtower avoid latching onto such a declaration. They would have to incorporate it into their scheme. Maybe that will be their undoing.