After three years of planning its union, VW and Porsche are finally "married". So now that Porsche belongs 100-percent to VW, what does it mean? Not much, at least for now.

The eagerness to tie the knot has been about unlocking the cost savings of the unified firm, said to be €700 million ($856M U.S.), and clearing out Porsche's debt burden of something like €2.5 billion ($3.1B U.S.).

The two have worked together on models like the Panamera and Macan and have a platform sharing future that's already been mapped out. The final paperwork will mean they can continue their collaboration more closely without regulators peeping in.