I mentioned on another thread a while back that I thought the KM would be folded into the Dub-WT.
There is a KM printed for each branch. Although the WT is identical around the world, it is printed at various branch offices.
It would not be difficult to add a few pages of branch specific KM articles and announcements on a monthly basis (since that is the same frequency the KM already comes out).
For all we know the dub-version of the WT will be handed out by bookstudy conductors like the KM is now. In that case it will be as private as the existing KMs.
Conclusion:
KM and private dub-WT merge
Awake and public WT merge
Result:
Cheaper pritning costs; less non-donated for materia (the KM); continued control and keeping of some info (supposedly) from non-dub hands.