Not to mention that there are a few unique aspects of WT ideology and eschatology that I also think may negate that possibility... that they have - for all intents and purposes - set things up too specifically for a truly effective eleventh-hour adaptation to really stick.
Think of it in terms of natural selection... as a (social) "organism", it just feels too specialized; too specifically adapted to its niche to survive the kind of changes that are occurring more and more in its environment.
One example could be the potential loss of tax-exemption that the Org's "business model" seems to have become dependent on (why else would they try so hard to keep it, after all?)...
...another would be the fact that the Org is coming under fire more and more from the secular (i.e. "worldy") legal systems of the world... which flies in the face of a prediction they've held as near-Gospel for almost a century... that "Babylon the Great" would be attacked before them.
The biggest one, of course is that despite their decades-long insistence, more and more evidence that they're simply wrong cannot help but make it increasingly difficult to maintain the fiction that the WTS is "God's Exclusive Earthly Organization"... which is - let's be honest - really the only carrot-stick combo that truly keeps the rank-and-file still loyal.
That is why most of us are here right now, after all.