So my guess is the focus of German diplomacy is enlisting the British and French into an alliance to take down the Soviet Union. Remember there is no Nazi-Soviet Pact but German diplomatic relations with Britain and France are not actually that bad. They might try to build on the Japanese alliance more but I never have understood what they were trying to do with this.
The British and French upper and middle classes had desired an alliance with Hitler to take down the Soviet Union ever since Hitler came to power.
The simple problem was that in Britain and France the upper classes were unable to overthrow democracy like Hitler, Mussolini, Franco, Salazar, Dollfuß, Piłsudski, Smetona etc. had. More crucially their working classes had the most extreme fear of the Nazis, desired an alliance
with the USSR, and a numerical advantage over the pro-Nazi upper and middle classes.
This meant that British and French politicians and businessmen, even though most sympathised with the Nazis, could not be too explicit about it. They knew massive, uncontrollable protests would result if they were as pro-Nazi as they themselves desired.
If there had been an earlier collapse of France’s left-wing Popular Front, an alliance to destroy Russia is not implausible, but there is still the question of the British, who had a newly powerful Labor party whose constituency feared anything remotely resembling a Nazi-type regime. If the British upper classes could have contained this group, an alliance with Hitler and even Japan to defeat and carve up the Soviet Union would have become easy, but I do not see it in reality.
This gives Stalin no end of stuff to worry about, mind you, since the Third Reich is now butting up against his own empire’s borders, and those Poles who showed that they didn't like Russia much in the Polish-Soviet war are now part of the armies of Adolf Hitler who has said all sorts of interesting thing about Jewish-Bolshevist conspiracies and “living space” in books and delivered speeches.
Piłsudski in the year or so before he died had desired an alliance with Hitler for the same reasons Britain and France had, although his unwillingness to sacrifice Poland’s independence made him cautious, as did his support for the ‘Soviet—Polish Non-Aggression Pact’ of 1932. His
de facto successor Edward Rydz-Śmigły failed to challenge this significantly, let along to discard it in favour of an alliance with Hitler, which was viewed as an unacceptable sacrifice of Poland’s independence. Smetona’s Lithuania – in some ways a similar regime to Poland or Dollfuß-Schuschnigg Austria – was even less able or willing to ally with Hitler, and in fact the Smetona regime put Nazis on trial when Britain and France were seeking to pacify them.