Something that I can think of, is that Hitler would be calling out Stalin and yelling about the atrocities of Bolshevism (both real and propaganda ones), and invoking whataboutism to the allies who are accusing him of the same things that Stalin has been doing since the 1930s.
How would the USSR and the world at large react to this? they can obviously just discard it as insane Nazi propaganda, but as the Cold War starts heating up, and Hitler is under trial by the Western Allies, the situation might be different.