Well...to consider the things that would have taken place for Germany to win...
That would mean the Soviet Union fell the same way Germany did: Losing in the other's homeland.
But for Germany to win, this is a combined force of Great Britain, Russia, Italy and the U.S... not to mention the rest of the world at this point, maybe even Japan, all against one country.
Germany is without nuclear weapons and the only country that did, is far, far away. All of Germany's "super" projects, with weaponry or biologically would have needed to be successful.
Even so, Germany would have a hard ass time beating the rest of the world, especially when their biggest foe has nuclear weapons.
So...
We are all f*cked. Everyone either gets turned into motherf*cking zombie warriors or get nuked.