The German war aims in WW2 were not territorial but political, their goals was to destroy Communism and Slavic civilisation, and once that was done take the land. This was in stark contrast with war aims in WW1, even toward the radicalised end, where Germany wasn't out to destroy Russian monarchy or the French republic but rather wreck their alliance, take buffer territories to enhance German security and wealth in a world where both still existed.
Thus it was impossible for the Nazis to have limited war aims, and even if they didn't Stalin entertained unlimited war aims for himself in the form of a drastic expansion of Soviet controlled communism.