There were proposals from 3 to 5 seperate states on the territory of Germany proper (borders of 1919) together with some wishes of territorial expansion by France (Saar-Region), Belgium and even the Netherlands (no joke).
In the - preliminary - end the 'just' created 4 zones of occupation with changing (over time as well the different occupation zones) degrees of civil self-management, until a 'final' solution might be found.
As stated above : Cold war braought the 'final' solution in form of 2 states.
About reintroducing aristocraty : really only some very few side thoughts at the very first internal talk (like a renewed Kingdom of Hannover or Saxony), mostly used to give the regions a name familiar to the 'older' politicians.