If the Nazis considered the Slavs as Aryans, and the war in the East was limited to restoring WW1 borders and liberating the eastern Aryan from Judeo–Bolshevism, how else could the Nazis have achieved the kind of living space and resources they would have achieved from Lebensraum in the east?
Would Lebensraum in Africa have worked? Assuming Germany is successful in defeating the British, and manages to make some kind of continuous African empire, could East Africa have become German? I have heard that the only reason East Africa (Kenya and Uganda in particular) received so little settlement was because of British policies and the fact that British settlers had other places to settle, and that East Africa would have been an ideal place for a settler colony to exist. If the Nazis also succeeded in controlling French Equatorial Africa and the Congo, along with securing control over the Mediterranean, they could have supplied this colony through railways through Chad or along the Nile from Italy (which would have probably become a German satellite in an Axis victory).
Could parts of the western Slavic nations have been integrated, similar to how the Netherlands was planned to be integrated? The Baltic nations and Czech Republic would be low hanging fruit for this, they all had significant German cultural influences.
How about the north? Could low density Nordic nations have been integrated and become German?