There have been many interesting comments on this thread, on how the org will alter its doctrines to keep up with the times. I think, though, there is another possible future for the Watchtower. You all seem to assume that they need a new set of dates or some new light on their doctrines if they are to survive. What if they don't?
Over the last few years, it seems like they have almost completely abandoned most of their core doctrines, either by admitting they were wrong about them (generation of 1914 seeing the end, earthquakes as part of the sign) or by just not discussing them at all(how long is a creative day?). At this point most of the those that have questions about their teachings have already left. The remaining r&f really don't care about doctrine, all they know is that they have the TROOF and they see no reason to leave. Now that most of them have accepted that the end of the system of things, although still certain to happen, may not occurr anytime soon, there is no real need to set another date. All that would do is lead to disappointment when the date arrives and nothing happens.
So the publications and study articles continue to be watered down, with no real content, no deep doctrinal material. Eventually of course, this will lead to declines as young people leave and no new members are brought in, but for now, the money still comes in... And although the boys at Patterson can see the problem, apparently they have no clue what to do about it, to turn things around. Or they are just to old to care....
No Apologies