I think we can get to know how it's going to be based on Daniel 11:31-45, Revelation 12:13-17 and Ezekiel 38:8-23. But these scriptures are not the only ones about it, because there are more. Daniel 11, Revelation 12, Ezekiel 38
There will be an attack on at least the WT headquarters, because what else would Daniel 11:31 speak about?
"they will profane the sanctuary, the fortress, and remove the constant feature. And they will put in place the disgusting thing that causes desolation."
After that will happen the things written in the following verses 32-45.
I would expect that the 'removal of the constant feature' ends the "theocratic" activity in the WT organization.
Instead local brothers and sisters "having insight" (verse 33) will guide. And "many will join them by means of smoth speach" (verse 34).
How long period are we dealing with here from verse 31 till about the end? Daniel 12:11 “And from the time that the constant feature has been removed and the disgusting thing that causes desolation has been put in place, there will be 1,290 days.
But some will be happy to escape this time to a remote place, in order that in the end become the target of Gog of Magog.
Ezekiel 38:8 and Revelation 12 speak about where the symbolic woman flees, to a place prepared by God, where the symbolic woman will be fed spiritually with the truth during 1260 days.