Well it's a claim that can never be proven!
So are they "anointed for heavenly rulership"? How can it be proven? Have any who have died ever sent a message or sign showing "hey! I made it!"?
Of course not.
No one will know for sure.
The GB should seriously consider the possibility of not receiving a resurrection. Once they fall asleep in death, they will not rise up in heaven or earth; they are no more.