Soviets start WWII

Jul 2008
the continent of Asia, Planet Earth
Okay, here's one for the speculative books... Hitler is killed sometime in the late 1920s or early 30s, ... Stalin tries to invade China/Japan to get an Empire, but fails, ( but weakens Japan enough so that it isn't in the picture)

Failing to defeat Asia, Stalin invades Europe... A weak Germany is easily defeated, and Italy, fearing that it might be next, signs an alliance with Russia. Spain's Franco is allied with Stalin but stays relatively neutral... Britain and France, with token US support (Roosevelt, under Congress pressure, doesn't sent American troops, but helps with money and provides weapons to Britain), takes on Stalin,

What happens next?