"When is this supposed to happen?"
A soon as Jesus takes the throne in heaven. Jesus said when he takes the throne in heaven, he'll send his angels to expose all the religious hypocrites by means of the governments dissolving the religious institutions (aka destruction of Babylon the Great.) They'll be figuratively burned up, the religious institutions, and the religious leaders will be figuratively weeping and gnashing their teeth, because no "Legal Department" or "Service Department" can stop it. Bye-bye WTBT$. No more WT elders misusing their so-called "religious authority" and abusing kids and Bethel covering it up, and all the other reproachful junk associated with religious institutions.
"When is this supposed to happen?" It will be like a thief in the night, at a time when they least expect it.
You can see the storm coming. It's about to strike. Jesus said the religious leaders could interpret the signs of a storm in the sky but they were too pig headed to know the sign that their destruction was near. It's the same today. The WTBT$ (and other religious institutions) refuse to change and get rid of their nasty ways. God isn't going to protect the WTBT$ when the governments come calling. God is the one calling the governments to destroy the WTBT$.
The WTBT$ likes to take Matthew 24:45 out of context, but here is what that illustration says in context:
"On this account, you too prove yourselves ready, because the Son of man is coming at an hour that you do not think to be it. Who really is the faithful and discreet slave whom his master appointed over his domestics, to give them their food at the proper time? Happy is that slave if his master on coming finds him doing so! Truly I say to you, he will appoint him over all his belongings. But if ever that evil slave says in his heart, ‘My master is delaying,’ and he starts to beat his fellow slaves and to eat and drink with the confirmed drunkards, the master of that slave will come on a day that he does not expect and in an hour that he does not know, and he will punish him with the greatest severity and will assign him his place with the hypocrites. There is where his weeping and the gnashing of his teeth will be."
The WTBT$ thought 1914 was the time Jesus was enthroned, but they were wrong. Jesus will be enthroned at a day and hour they do not expect, and then he will come make an accounting with the religious institutions. Now is the "day" the religious leaders do not expect and now is the "hour" that they do not know. It's soon.