Did Hitler regime ever repudiate Lebensraum theory

[referendum]

One of the main arguments against the Hitler regime in Germany was that it was aggressive and genocidal by its very nature, in that the theory of Lebensraum called for conquering lands to Germany's east and either killing or enslaving the slavic population and resettling these areas by Germans. In Mein Kampf Hitler certainly did talk about Lebensraum, though I don't believe the National Socialists campaigned on it very much during the Weimar Republic days. The assumption that the National Socialists always had this war of conquest and annihilation as a long term goal ranks as one of the main indictments against the regime. In the case of the Jews, whats clear is that up to the start of the war, and even after it started in many cases, the German government was focused on expulsion, not extermination, and that this plan was by and large completed in Germany proper, with the emigration of a majority of German jews and it was well on its way toward completion when the war started in German annexed Austria. The charge of Lebensraum aggression however dovetails with the progression of the war, in that Germany ends up attacking Russia, the very site of much of the territory implied as future German lands in Mein Kampf. What evidence do we have that conquest and subjugation and enslavement of the native populations of these regions was not on the German agenda as the war unfolded?