Nazi plans were sort of ambiguous as to what would actually happen to the Slavs after the conquest of the Soviet Union was complete. Nazi Slavic policy was never comprehensive or coherent either; the Nazi leadership were perfectly fine with Slavic people who aided overall German war aims and who did not happen to live in prospective Lebensraum. Slavic nationalities who did live on what was considered future Lebensraum or who actively resisted Axis military or occupational forces were essentially marked for destruction. For this reason, the Bulgarians, Croatians and Slovakians were granted autonomy and ultimate self-preservation, while the Poles, Czechs, Russians, Ukrainians etc. were to be eradicated.

Even within the Nazi party's leadership, attitudes towards Slavs were not unified or coherent. Some like Rosenberg were incredibly anti-Slav while Hermann Goering was surprisingly less prejudiced (he admired the Poles for their military resistance against Bolshevism and wrote the forward for the German edition of Marshal Pilsudski's collected works). Even as late as 1938, a Nazi Nuremberg Rally pamphlet listed the Slavs as an 'Indo-Germanic' people alongside the Germanic and Celtic peoples.

Nazi Slavic policy was thus inconsistent and malleable, and was often changed and reworked according to circumstance. They would attribute 'Germanicness' to Slavs whenever it was politically convenient, such as when Cossack units deserted to the Axis or when the Soviet Army began to reorganize and gain the upper hand (Himmler once claimed that Stalin must have been a lost Aryan despot akin to Genghis Khan). During the war, Hitler and Himmler became convinced that the 'Slavic race' was actually a social construct devised by the Imperial Russian Pan-Slavists and that Slavs could be reduced into a multitude of racial sub-types. The goal of this move was to destroy any claim to Polish, Russian or Ukrainian nationality and to play Slavic communities against each other by favouring the more 'Germanic' ones.

The general outline for what would happen to the Slavic people marked for destruction was this: over 50% would be liquidated or relocated, a smaller percentage would be kept for slave labour while an even smaller percentage would be 'Germanized'. The proportions differed for each nation, with nearly 50% of Czechs marked for Germanization while most Russians would be destroyed or removed. The plan was to kill as many Slavs through starvation as possible which was actually iniatited with the Hungerplan, where all food resources in the East were directed to German military forces. The mass starvation of Soviet POWs was part of this plan. Afterwards, the remaining population marked for removal would be relocated 'east of the Urals'. Whether this meant the establishment of some German run protectorate rump-state or was a euphemism for full on genocide was unclear, possible intentionally.

In reality the destruction or removal of the Slavic population was impossible. The amount of Soviet people set for destruction would have left the Soviet east completely unworkable. There were simply not enough German colonists to make the removal of Slavic populations feasible; even during the war German colonists barely made inroads in occupied Poland, and even there they had to rely on local labour. Low German birthrates and available labour would make the wholesale removal of Russian, Ukrainian and Polish populations simply unfeasible. Unlike the Jews, the Slavs weren't really perceived of as a unified race which made their complete destruction impossible as well. Basically, the Nazis had no clear or unified Slavic policy, and when they did develop one, it was basically impossible to actually implement in the real world.