I wrote about this in a previous thread. I actually have a very different opinion on this matter. I don't think that the JW religion will ever implode or disband. Here's why: a huge percentage of JWs are absolutely and totally committed to their ideology. This organization is not just a corporate entity that owns property, buildings, and printing presses. This is an organization that is made up of millions of deeply indoctrinated zealots.
Even if the Watchtower corporations were to go bankrupt, or close shop, there would be no limit to the dedicated members who would just set up a new corporation. So, even if the Watchtower society were sued into oblivion; JWs would just set up a new corporate entity under a new name such as Watchtower Bible Society, or Watchtower Inc., or something else.
As far as declining membership and the number of ex-JWs is concerned, I actually believe that the more ex-JWs there are, the more this will galvanize devout JWs. Obviously, the more ex-JWs there are, the more opposition they will face to their preaching work. Opposition to JWs is the fuel that drives this machine. So, even if the Watchtower Society's corporate structure were to get hammered by lawsuits, this would only feed into the persecution complex that JWs have.
I think the more opposition this kind of group gets, the more emboldened they become. As long as there are humans on earth; there will always be totalitarian pseudo-Christian cults which attract people through demagoguery. JWs just happen to be one of those groups.