I don't think that it will be destroyed or reformed. Instead, I think that a group of JWs who do their own thinking but still buy into the basic theological stuff [but not the stupid rules/regulations/control] will get so disappointed with the current JWs and will start a new type of JWs. The existing JW structure will remain for those who like to be controlled and have their thinking done for themselves. This latter group will tend to be of low membership while the new JWs will continue to grow.
Then, you'll have basically an Orthodox JW group and a Reformed JW group, just like you have in most other religions.