Whatever it is, they have to know that the second they tell the first group of elders, it will be leaked to the world. I agree with those who are saying its more of a procedure change than a real change in doctrine.
It's been in the works for awhile and my guess is that it's related to something financial since that's almost as important to the GB as power is. Boy, tithing would be a really tough thing to implement. They've railed on other religions for years and years about that. I think it would be easier for them to change doctrine that to get a tithing arrangement in place.
I can see a change in how they handle pedophile cases being a possibility and one that they would want to explain face to face to elders and answer questions. There are many elder bodies that can't follow simple instructions in BOE letters and the WTS has got to do something to stem the tide of lawsuits.
I seriously doubt there would be a change in FS although I did catch that comment a few weeks ago in the WT. Still, that's one of the few things non-JWs know about JWs (no holidays and no blood being the other things).
Whatever the change, I'll bet we find out about it here before the majority of the elders do!!!