I just noticed in the jw.org site that the Watchtower Society recently published online the first book of the Study Bible (Matthew), a new edition of the NWT Bible.
So far, I'm seeing an Overview of the book considered, and explanations of various verses of each chapter throughout. It is not a full commentary. There are no maps shown yet in the Bible. That may be forthcoming. It is therefore a work in progress.
Also, I am disappointed that the Society sort of butchered the included Kingdom Interlinear in the Online Library. I am not speaking of the translation itself which is perhaps the same good one found in printed editions of the book. I am referring to the lack of adequate spacing between English glosses found above the Greek line. The printed editions were a model to follow, not so with the Online Edition. I wonder who was responsible for messing this up so badly. Shame on you Watchtower! Fix this up! Bring it to the excellent level of printed editions.