Personally I think that after Austria and Sudetenland there are a couple of territories Germany can get without a war with the UK (and thus France). Those in my opinion are Danzig (and maybe the corridor, although that is pushing it), Memelland and the Germanspeaking parts of Belgium. There is also the possibility of Southern Tirol, but that will end in a war with Italy (but I don't think the UK or France would care). If Hitler is smart and plays his cards right, I think, he can get those without a war with the UK and France. Of course as this is Hitler we are talking about, I doubt he would have. He wanted a war after all. But let's say he is able to convince both France and the UK to annex Danzig (which probably would be the next step), how would Poland react? Would they fight a war over Danzig? I am fairly certain they would fight a war over the corridor, which was not only vital for the Polish economy, but even had a Polish majority.
So, if Poland hands Danzig over without a war, what next? Hitler bullies Belgium and Lithouania into handing over the East cantons and Memelland. How will the UK and France react? France did prevent Belgium handing over the East Cantons a couple of years earlier after all.
If Poland goes to war over Danzig (or the corridor), would the UK and France stay out of it? if so what would happen to Poland after the Germans win that war (which I think they still would, even without Russian help or the Chech resources)? All of it annexed by Germany? A Polish vasal state created out of non traditional German parts of Poland to appease the British and French and prepare for the nex assault? Where would the next assult be? The Soviet Union, the enemy Hitler was preparing to fight all along or would Hitler go after France first and be able to annex Alsace-Lorraine (and Luxemburg when he is busy anyway)?