I know several Wit-lesses that to date are researching these topics.
However I haven't heard much from any publications recently about it, I think the latest refresh was ~10 years ago. Since then the power of the US has severely diminished (or at least the rhetorics about it has), Russia is a small potato in modern era, the EU is a cowardly dog in the eyes of everyone and we have the rise of China which is as far as military might is concerned, a paper tiger.
We also have the rise of Islam, especially since the end of the NATO nation-building effort in Afghanistan which is now in power in most of the Middle East and Africa, as well as regions of Asia and growing strong in Europe.
Does anyone have noooo light about these developments. Is Islam the King of the South? Is China the King of the North? What does Daniel have to say about any of this?