If you really think about it, nothing about this endtimes teaching makes any sense at all.
And I do not believe that the JW's will survive any coming destruction anyway because they have not accepted Christ as their savior. I really see them as part of the Anti-Christ.
The bible tell us that when Christ returns those that are saved and still alive will be "caught up" in the clouds to go and be with the Lord forever.
1 Thessalonians 4:15-17
New International Version (NIV)
15 According to the Lord’s word, we tell you that we who are still alive, who are left until the coming of the Lord, will certainly not precede those who have fallen asleep. 16 For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. 17 After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever.
Now the JW will have you believe that only the 144,000 will be "caught up" and the rest will be left to rebuild a paradise earth. But there is nothing in scripture to indicate that.
I believe that most of what the JW's teach about the end is a result incorrect interpertation and out right lies and that most of they teach had to do with the fall of Jeruselum.
They twist scriptures, and make up things like second fullfillments, etc. and even rewrite/reword scriptures to fit their twisted docturines.
The truth is to be saved you must do as it says in Acts 16:31, “Believe in the Lord Jesus, and you will be saved—you and your household".
If you do that then you have no need to worry or be concerned about the end, or what will happen after.