First of all, the HQ is NOT called the Branch - these are tro separate things, the Branch is the center of the US activity, the HQ is the center of the worldwide activity. Two separate entities.
One very wise comment was made, "if there is a major doctrinal shift rolled out at the annual meeting, it will be something that they've already begun to downplay or at least haven't mentioned in awhile"
If you look at the organization brochure issued a couple of years ago, you will notice when it discusses the servant / gb, that it says more or less nothing, it does not say that it represents the remnant - and that is because the change to the gb being the servant was already on its way, and it would be strange to suddenly change the teaching a few months after a brochure had been issued. Likewise now, you cannot change 1914 a month after it has been stated as the start of the last days at a wt study. Look for something that has not been mentioned for a while, that has been downplayed, that has been a bit watery lately, and that is where a possible change will come.
Was I the only one that noticed that in the article on babel and the origin of languages, a stone tablet with Babylonian writing was labelled as dating from around year 3,000 BC? But year 3,000 - that is 500 years before the flood......................