wholesale reinvention of their eschatological beliefs.
I won't doubt that this is a possibility.
I tend to think of it this way. The 1975 fiasco was 33 years ago. Add to that people who were babies all the way up to 10 years old or so were probably not affected, nor understood what happened at the time. This means that anybody in the organization under 40 has never experienced the fallout of a produced date.
From what I see the WTS is currently nearing the end of what can be labeled the "post 1975 era". After the 75' fiasco the Watchtower adjusted a number of policies and practices and set in motion an organization structure that essential remain unchanged until the last few years. Almost every member of the governing body through the 70's, 80's, and even some of the 90's came from the 1970's and earlier. I don't believe any members were elected to the GB in the 1980's.
So the current question is, what is the Watchtower going to do to transition out of this 'post 75' era? Because so many people are in the organization never have experienced major eschatological change, they may move in that direction sometime in the next 15 years or so. But I believe there are some major dangers that face the WTS in this regard.
If the eschatological structure is changed to suggest that the end will occur within 30-40 years the Watchtower could suffer a terrible fallout after such things fail to pass. They are not as strong as they once were and neither are their believers. Notice how the Watchtower continues to harp on about how "bad" peoples attitudes are within the group. This is a more recent development which came through somewhat in the 1980's, stronger in the 90's, and is blaring in the 00's. The Watchtower has more members today that are willing to complain and get frustrated than ever before (and for good reason!). Promising the end within their lifetime is a hell of a lot more risky that promising it to those who survived the Rutherford years.
Also, the WTS has made a number of moves that suggest they are sticking with their current model. Reprinting and studying the Revelation book come to my mind. They also have refined their generation teaching into a belief that simply can go on indefinitely.
The general feeling that I get is that they recognize that reform is needed, but are unwilling to give up their beliefs in order to deal with it. This is why I think the future is dangerous for them. Either they move into some pretty serious reform, or they take the risk and put forward a new eschatological system. But one thing they cannot afford to do is slowly change the organization in fairly mundane ways over time while continuing to hold to beliefs that hinder their progress. I believe that such inaction moves them further and further towards a position of complete irrelevance.