There are those who say it could have won Hitler the war. Of course, the most vocal proponents of that thesis (writing in the 1950s and early 60s) were, we now know, in receipt of funding from exile organisations from various nations within the USSR that were holding out for a US invasion and a greater role in their countries post-WWIII. Still, a concerted strategy of 'liberation' might have made that drive to Moscow feasible, and from that point on...
Of course, we are talking about Hitler. That strategy would have to be developed and implemented completely without his knowledge. Cooperating with Slavic nations? Impossible. If he had been just a little saner, or if he had left the running of the war to professionals, a strategy of 'freeing the nations of Europe from Bolshevist terror regimes' (however temporary) could not only have worked, but also been sold with some success coming, as it was, from a regime that believed unreservedly in national identity on an ethnic and racial basis. But of course, if he had just been a little saner he wouldn't have started the war in the first place, so the point is kinda moot.
Still, the thought of an Eastern Europe dominated by Nazi Germany, completely 'judenrein', and governed by ultranationalist, militaristic puppet regimes running their little tinpot ethnically cleansed states to supply Germany with raw materials... Yuck