>>64120437 (OP)
Nobody is reading all that.
Very realistic alt history situation though, Leon Trotsky takes over after Lenin instead of Stalin. Trotsky was a lot more aggressive and would have started shit with Germany first, there would have been a real possibility of US joining on Germany's side and the USSR getting rolled from both sides. They also wouldn't be as industrialized in that scenario because that was largely the result of Stalin, and they would have been internationally isolated. Without the USSR being successful in WW2, China wouldn't have flipped red. They would either be a puppet of Japan or nationalist under Chiang Kai-Shek.
America would still have beef with Japan if they had attacked Pearl Harbor, but I'm not sure how WW2 starting early would have changed that timeline. Relations between Japan and the US would have been at best icy in either case.
It is also entirely possible that WW2 could have been a 3-way slug-fest between the Axis powers, the USSR and the rest of the allies (mostly US and Commonwealth). Either way the USSR would have been wrecked in pretty short order.