Will there still be a Governing Body?
The Governing Body will still exist in practice, but they will call it something else. They will drop the name Governing Body and call it some other, more modest-sounding name similar to how they dropped the term Presiding Overseer for the more modest sounding Coordinator of the Body of elders. Maybe they'll call the Governing Body the Coordinating Body or Coordinating Committee or something like that.
Will they finally drop 1914?
Yes they will. They will drop 1914 altogether by accepting the correct date of 587 BCE for Jerusalem's destruction and discarding the teaching of an invisible presence. They will be forced to accept that christ's presence is the same as his coming and that it starts in the future - the "very near future, any day now", of course. lol. But they will do all of this only after they have come up with an alternative method of elevating themselves as the faithful and discreet slave, and which does not involve being indirectly tied to a definitive date like 1914.
Will the blood doctrine finally be dropped?
Yes. It will become a conscience issue the same as organ transplants.
Will disfellowshipping be dropped?
No. But its possible that there might be some easing up on the shunning of disassociated ones if they meet certain criteria. Anyone citing false teachings, false prophecies, hypocrisy or any other kind of maleficence on the part of Watchtower, as their reason for disassociating, will be branded as apostate and shunned upon disassociation. But anyone who simply says they no longer wish to be a JW without saying anything negative about the organization to the elders or other JWs will be allowed leave and be treated as an inactive person. Family will be permitted to have the same limited or guarded social contact with them that they would have with any other non-JW relative with the added restriction of not having spiritual association with them - they can't pray with them of have spiritual conversations with them. But Watchtower will teach JWs to shun any disassociated one who starts to talk negatively about the organization. So they will make shunning of disassociated ones conditional on whether or not they express negative or critical views of the organization. That way Watchtower gets to improve its image as allowing people the option to formally leave the religion without shunning them; while at the same time also protecting the flock against "apostate" views by alerting JWs to shun any who leave and start expressing such views. Those who disassociate from the organization on "good" terms will be announced differently to those who are disfellowshipped or disassociate as an overt "apostate".
Will there still be Circuit Overseers, Elders, Pioneers?
Pioneers will still exist but they will be called something else. They will drop the term pioneer as they come to see it as a misnomer. Pioneer hours will drop to something like 50 hours a month and auxiliary pioneer hours to 30. Pioneers may be required to meet an additional requirement in addition to the monthly hours quota. They may be required to also have a minimum number of return visits per month and conduct a minimum number of bible studies per year. These rules will be enacted in a bid to motivate pioneers to do more to get people studying and baptized - to grow the membership numbers. Circuit Overseers and Elders will continue but perhaps they will be given more power.
I believe Watchtower will be forced to give more power to elders or, more accurately, give elders the appearance of having a more prominent and important role in the organization. By some means - perhaps by periodic confidential letters to bodies of elders worldwide - elders will be made to feel like they have a say in the formulation of policies and doctrines. Of course, Watchtower will just pick the suggestions from the elders that closest match what Watchtower wants to do, and maybe tweak it a bit further to match exactly what Watchtower has in mind. But the elders who appear to come up with good suggestions would feel like they've made a major contribution to the organization and will well up with pride. Elders will thus be made to feel like they have a stake in the organization's operations and be motivated to act more loyally toward the organization. More brothers will then be motivated to reach out.
This process will give JWs the appearance that power in the organization is less concentrated at the top and trickled down more to the middle, and that therefore the organization is less authoritarian. This will serve as a rationalization or refutation against the accusation that the organization is an authoritarian cult with all the power concentrated at the top in the hands of the leadership in New York.
Will there still be Judicial Committees?
Yes. But the manner in which they are carried out will likely be adjusted, especially in the wake of investigations like the Australian Royal commission and other future investigations and legal suits.
Will they still have conventions 3 times a year?
Yes but the three-day convention will be reduced to two days with the Friday being eliminated to eliminate the work-related stress that JWs have to undergo to get time off. Also, due to fewer being in attendance on that day. To make up for this there will be other special meetings during the year, which will be held in kingdom halls and will likely involve content being video streamed into kingdom halls from headquarters.
How many meetings will they have a week?
They same number of meeting days but they will have additional special meetings, held less frequently, on the same meeting days, to break up the monotony and give the appearance of exciting developments. See above.
Will they still go door to door preaching?
Yes, but they will start focusing on other methods like online witnessing. It's possible that JW.org might start a strictly moderated live chat or video web app to allow people around the world to come online at any hour of the day and have a bible e-study with a JW volunteer or e-publisher. These e-publishers will be pioneers around the world who are all scheduled to be available online for specific hours on specific days.
Will they drop the name; “Watchtower Bible and Tract Society?”
It is very likely that they will rename the Watchtower magazine and drop the name Watchtower Bible and Tract Society as way to distance themselves from all their crazy, damning literature that is online and quoted by "apostates" and attributed to Watchtower.
How many members will they have worldwide?
If a split occurs - and I believe it will - the numbers will suddenly drop by at least a third to about 5 million or less. If not, the growth rate will continue to decelerate until it finally stops and starts to decline gradually.
Can you imagine in the year 2050 going door to door and preaching;
“Hello, we here this morning announcing Jehovah’s Kingdom that started ruling in the year 1914”
Absolutely not!
