It would be pretty hard to argue that it's God's earthly zorganisation if it was suddenly not there anymore.
You sure about that? JWs believe that governments will turn on them near the end. And it's the 'last days of the last days' now.
Take an average JW, bonk him over the head, put him in a coma. If he woke up one year later and found the WTB&TS had been dissolved, that would pretty much line up with what he'd expect. True, it's a bit out of order - other religions wouldn't be dissolved. But soon he would find the new corp, adopt the new name, accept the new light that they had the order a bit off ("oops we assumed it would happen like this and got a small detail incorrect, but look at the big picture!"), and soon he would be JW-ing as hard as ever, probably more so.