Now what?
Could the Soviets continue fighting without access to the oilfields of the Caucasus? Did they have enough left for a campaign to retake the south, or is the eastern front over?
How does the war end if the bulk of German forces remain? I think it's impossible to pull of D-Day. The A-bombs would probably get the Germans to the negotiation table. Maybe France and Norway may be set free, but the rest of Europe will remain under occupation.