What if the Soviets, hoping to delay a Barbarossa until 1942 or 1943, try to avoid antagonizing Germany. This would involve:
a) avoid occupation of Bukovina when occupying Bessarbia (this way annoying to Hitler as it was more than expected)
b) Not pressing on the issues of Bulgaria and Finland during the Molotov visit in 1940 (also annoying Hitler)
c) Lightly occupy the areas along the new border with Germany (hold the armies back a bit, 100 miles fro, the border)
The goal is to convince Germany that the Soviets are no immediate threat to Germany and the Germans could do a strategy of trying to defeat Britain first, giving the Soviets a year or two more to rearm.