You might be interested in some threads from the FAQ section on the "Axis alliance and post-war plans":
What were Nazi Germany's plans for after the wars? - 13 comments, over 1 year old.
This thread is completely devoted to Nazi plans for Eastern Europe in the event of their victory.
During WW2, were there any conflicts of interest between Nazi Germany and Finland regarding the future of St. Petersburg, Estonia and other occupied territories? - 4 comments, over 1 year old.
A commenter pulls up a proposed map by a German government agency during the war of post-war borders with respect to Eastern Europe and Finland.
In "How did the Nazis plan to end the war, by that I mean, was there an endgame of when to stop, or did they just plan to take over the world, if so, what were their plans to do so?", /u/ScipioAsina made a very relevant comment here - 158 comments (thread), over 8 months old.
This comment is in response to another user talking about Nazi Germany's plans, however the bottom half of it discusses a research paper published by a section of the Imperial Japanese government that called for joint Axis invasions of the United States in the future.