So just how was Nazi Germany hoping WWII would end?
You may be looking at this from a wrong perspective. Nazi Germany never had a master plan to conquer the world. It never had a plan to wage war on a world scale.
Nazi Germany certainly had military plans ready on how to conquer their neighbors. Because that's what the military gets paid for. And those plans got executed after the war started.
But Hitler was no great strategist. He was a lousy strategist. He was a gambler. Or Hazardeur. He occupied, annexed or conquered Rhineland, Austria, Sudentenland, the rest of Czechoslovakia and Memel hoping that the major powers would not react. Hoping their fear of another great war would let them stand by twiddling thumbs while Nazi Germany grew in power. And as yet another gamble, Hitler attacked Poland, counting on the Allies to back down just as they had the 5 times before. But he ran out of luck. Britain and France finally stood up. Another great war started.
Hitler had never wanted that great war. He had wanted to conquer Poland and expand eastwards to claim "Lebensraum im Osten" (room to live in the east). Probably by attacking and defeating Russia in a single, one-front war.
So Hitler's goal had been to conquer Poland and large parts of Russia. Maybe the Baltic states, too. Britain and France had declared war on Germany. And while conquering a nation is not exactly a defensive move, Denmark and Norway were more of a defensive move to protect The Reich and it's important resource trade. Yugoslavia and Greece were basically a big mess that was never planned. The low countries, Belgium and Luxembourg weren't exactly a target on their own right, more of an easy way into France. And even defeating France, while certainly a brilliant military planned and executed piece of warfare, had never been a strategic goal in Hitlers plan.
Hitler was no scheming mastermind plotting world domination. He had no vision of how the war against the worlds major powers would successfully be brought to an end, because he had never wanted that total war. He had wanted a series of limited wars to build a thousand year Reich and have "Lebensraum im Osten".
Disclaimer: just because he did not want a global war, does in no way diminish the fact that he was a criminal, aggressive, expansionist, evil dictator. I'm just saying he would have preferred it if he had waged a war he had a chance of winning.