I'll sum this up as best I can:
Poland is reintegrated into the Soviet Union and becomes an SSR. East Prussia probably falls as well. There's a possibility that the Baltics will also fall. We can expect rather nasty insurgencies in all of these territories that could lead to some rather heavy-handed Soviet tactics.
Germany will not go Red, nor will any other part of Europe. In fact, we will likely see Germany play the role Poland did in OTL, that is, being the buffer between Western Europe and the "Asiatic Bolshevist Hordes." Versailles will likely be allowed to fall apart as Germany increases its armed forces with tacit support from the British and maybe even the French if enough pressure is brought to bear on them.
Germany will probably become some sort of military dictatorship or, at the very least, a hyper-militarized state in alliance with basically every other Western European power. Czechoslovakia and Romania will probably go down similar paths. A war between a larger Soviet Union and Western Europe is almost unavoidable, IMO.