Do you mean
1) the Netherlands are considered German,
2) *Germany is organized mainly into influence zones of three powers, and
3) then they ally to form some kind of alliance?
Is that what you were asking for?
This seems not too likely. This is not because these hypothesis would be so far-fetched, but the combination is a bit specific.
It does appear in the "Decades of Darkness" timeline though, at a relatively late stage: The main change for Germany is a different War of the Sixth Coalition. I suppose you might be interested in earlier PoDs as well.
So you might look up the reasoning on this in "DoD", which of course can be challenged. As it is not the main topic of the TL, the appreciation of this moment is also relatively short.