Additionally, I believe that even if the Soviets courted the old Nazi leadership, the German armed forces, especially the Wehrmacht, would have supported a renewed Third Reich. Both the officers and the troops would have been happy to fight, even in American or British uniforms, to free their land from the Soviet yoke. The hard core Nazi group was so connected to Hitler that the fall of the Third Reich discredited them. Look how rapidly the West Germans adapted to democracy and free market economics after 12 years of Naziism and three years of Allied military occupation.
In short, the Red Army would have been facing Anglo-American forces, armed with nuclear weapons, in the unfriendly climes of East Germany and Poland. BTW, I believe the U.S. could have built numerous atomic bombs in short order, as the nation's industrial and scientific bases was at full steam in 1945.