no-zombie: by the time they die ... Jesus would have been ruling invisibly in heaven (doing god knows what) for 200 years.
Well, he was apparently twiddling his thumbs for almost 2,000 years before ascending to the throne. What's another 200 years?
The problem for the WTS is that their brand thrives on urgency. If the end is not extremely close, then recruiting slows and the message is not well received. If the end is not upon us, it is also difficult to retain members who waver-- they might hedge their bets and stay in otherwise. They occasionally will explain that 'God is patient and wishes for all to be saved' as a way of explaining why the end has not yet happened. But they cannot change their approach. The end must be very close, always.
As for 1914/1918/1919, time can help to wipe away a lot of that, though the internet has changed the ease with which they could make old ideas go away. I do think they have an issue with putting that era behind them: both Russell and Rutherford were larger-than-life figures with moments that the organization can still point to (photo-drama of creation, Cedar Point talk, etc). Knorr... not so much. Do they find some way to highlight his time as president? Do they just forget him and focus on Fred Franz? Oh, wait... the most notable moment of Franz's career was the 1975 prediction.
Yeah, they're screwed.