IMO, ONE particular is being fulfilled right now.
Now you must understand that since JW's identify themselves as YHWH's only true worshippers, this lines them up to be part of prophecy. They become accountable to GOD for their actions or inactions. All the prophecies in the OT which refers to judgement on a wayward people, which JW's apply to Christendom, actually apply to JW's, this being because of their habit of identifying themselves the same way the ancient Israelites did.
Since only the GB lays claim to being part of the 144k annointed ones and most JW's being "Other Sheep", the following prophecy most clearly pertains to JW's (although others could be guilty of this as well). Mind you, no scripture in the Bible speaks of there being an earthly representative on earth who speaks in GOD's name in the last days. Yet Jesus spoke on the presumptousness of these ones and how they should govern his flock, but what many do instead and why. Keep in mind JW's falsely prophesied the Lord's return in 1914 and since then have changed doctrine to support the apparent delay in the Kingdom being established.
Matthew 24:45-51
"Who then is the faithful and sensible slave who his master put in charge of his household to give then their food at the proper time? Blessed is that slave whom his master finds doing so when he comes. "Truly I say to you that he will put him in charge of all his possessions. But if ever that evil slave should say in his heart "My master is not coming for a long time", and begins to beat his fellowe slaves and begins to eat and drink with the drunkards", the master of the slave will come on a day the slave does not expect him and at an hour he does not know, and will cut him in pieces and assign him a place with the hypocrites; in that place there will be weeping and gnashing of teeth".
In recent years the WT falsely proclaimed that the Lord inspected his belongings and found them in good steed and then placed them over all his belongings. History proves this as incorrect as the 1k reign has not yet begun nor did Jesus return, because if he had, then all the events that immediately follow that return, (such as described in Revelation) would have occurred, which obviously they haven't.
Whether JW's are or are not YHWH's true servants is quite relavant, in that the Israelites were unfaithful as well and were disciplined many times for their wayward course. The WT somehow thinks they are exempt from any reproof and demonizes Christendom for it's many crimes throughout history, yet during the past century the WT has duplicated many of those crimes, yet unlike Christendom who has admitted fault and made some reparation, the WT covers evertything up.
Hence the fulfillment of the "beating their fellow slaves". Also since their dating system is flawed, Jesus plainly says that his slave would not know when he would return and his slave's actgions toward fellow believers would be because according to the slave's reckoning, Jesus was delaying.
In previous verses, Matthew 24:15-28 Jesus commands his servants to flee from the apostasy of Jerusalem, unless they want to share in her sins also. Jerusalem being the Governing Body and those Annointed who support them thru direct action or inaction.
Online discussion groups (such as this one) that speak out against the WT atrocities and the many lawsuits leveled towards them, show without a doubt the ongoing fulfillment of this prophecy.
"Let the reader use discernment"