I see no reason why Goring would undo the commisar order, they'd probably just deny it ever existed and was the actions of some low levels gone rogue.In this ATL, while I believe that Göring would definitely continue the war against Russia, he could still keep a “Peace With Stalin” option open by taking 3 immediate actions from a position of strength. These 3 actions would benefit the German war effort and, at the same time, be a silent signal to Stalin that, just perhaps, a deal could be made with Göring.
(1) Immediately revoke the Commissar Order that Hitler had issued June 6, 1941, which called for the immediate execution of captured, or even suspected, Soviet political commissars assigned to Russian Army units. Hitler himself, in OTL, cancelled the Commissar Order on May 6, 1942:
(2) Stop starving captured Russian soldiers which angered the Russian people and also increased their will to fight the Germans. Göring could have done this many months before 1942.
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(3) Remember that Ribbentrop, the German Foreign Minister, also would have died in the plane crash along with Hitler, Mussolini and Himmler. Hitler and Ribbentrop had been responsible for the Non-Aggression Pact with Stalin. These betrayers, as Stalin would have regarded them, were now out of the picture.
Göring was the new leader, maybe someone Stalin could consider dealing with. Perhaps, especially if Göring appoints someone who might be very acceptable to Stalin as the new German Foreign Minister. This someone could be Count von der Schlenburg.
Count von der Schulenburg had been the German ambassador to the Soviet Union from 1934 until 1941 when the Germans invaded Russia. He was totally against a war with Russia and had been proud of the improved German-Russian relations from 1939 to 1941 which happened on his watch. Indeed, he had been “kept in the dark about Germany’s planned invasion of the Soviet Union” as Wikipedia states :
The reason I think a “Schulenburg Gambit” might work as a signal to Stalin is because Stalin used a similar method of signaling to Hitler when he replaced his own Foreign Minister Maxim Litvinov with Molotov in May 1939, shortly before Hitler and Stalin concluded the German-Russian Non-Aggression Pact in August 1939.
Stalin would recognize the signal. Whether he would act upon it or not, is a different question.
Starvation will continue wether Goring wants it to or not. This is because there simply is not enough food to go around in blockaded Europe in war time. Maybe years later after recovery from the devastation the eastern territories of Ukraine could produce enough food, but definately not while the war is still going on.
Stalin may be willing to make a deal, and Its certainly a possibility. However Im not sure he would trust Goring more. Goring was an aristocratic, imperialstic, capitalist of the Kaiserreich, and thats how he would be viewed in Moscow. Hitler was a prolaterian man of the people. So its not as cut and dry as you may think,