Yes it is possible. POD must be Poland being run by someone competent like a healthy, young Pilsudski, the one from 1920. They simply had no other options. Western allies were of no help- they couldnt do much more than declaring war, Britain had a token army and France was so defensive theyd have to be mad to leave Maginot line. Blind Polish leadership didnt even think about Germany allying with Russia while it was obvious. If you rule a country like Poland- between two expansive totalitarian regimes without any real possibility of being helped, what can you do? Bleed for nothing and be betrayed ( western allies did what they had to, traded Poland and central europe for soviet manpower) or submit to one of them. Germany is the one less liked, but it's the one that can be defeated by the western powers, wich have no real interest in destroying the USSR. Sure theyre commies but who cares? Germany is just beyond the Rhine... So, consider this: After Munich Poland allies with Germany (it will be a satellite de facto but noone will say it loud... yet) ceding Danzig and allowing to build the highway like Hitler demanded. It will cede rest of the corridir and Silesia sooner or later but not yet. What happens?
Is Ribbentrop-Molotov pact still signed (forcing Poland to cede few eastern provinces to the SU)?
Where does Hitler strike? France or Russia? - if he goes for France it' going to be probably be like OTL: a quick defeat with Stalin not having enough time for a backstab, even if he wants to, but if he goes for Russia what are western allies doing?
Who is in charge in the UK?
Is Ribbentrop-Molotov pact still signed (forcing Poland to cede few eastern provinces to the SU)?
Where does Hitler strike? France or Russia? - if he goes for France it' going to be probably be like OTL: a quick defeat with Stalin not having enough time for a backstab, even if he wants to, but if he goes for Russia what are western allies doing?
Who is in charge in the UK?