Interesting question. Hitler considered Slavs to be only a little better than Jews, and his plans for the Russian people were horrific. He didn't rate the Eastern Europeans that low, and many fought in the Wehrmacht during the war.
Germans would have been the dominant privileged class and Eastern Europe would have been drained of resources to support Germany, but that's pretty much what the Soviet Russians did to Eastern Europe after they won instead.
We would have developed the nuke and won the war. And they would have still been free.
Hitler's family was largely of Germanized Czech stock and many Prussians were in fact Germanized Poles. so much for their racial theories.
"Germans would have been the dominant privileged class and Eastern Europe would have been drained of resources to support Germany, but that's pretty much what the Soviet Russians did to Eastern Europe after they won instead."
If Hitler had won, there wouldn't be Russians, Poles, Czechs, etc either. They would be either exterminated, Germanized, or enslaved to serve Master Arian Race. As for Soviet Union draining resources of E.Europe. it's actually a bit other way around. Stalin and especially Brezhnev drained the resources of Soviet Union to prop up Soviet minions in E.Europe and around the world, subsidizing local Communist Parties, militaries, etc. It was a slave like system, and Stalin and Brezhnev drained resources of their own country (or Empire if you will) to spread this ugly system round the world.
FYI, the artificial famine in Soviet Ukraine 1932-1933 was happening when Soviet Union exported grain at record numbers while their own people were starving. Perverse regime.