Stalin's 'neutral Germany' proposal is accepted.
Both Soviets and Wallies start working to keep the other from influencing the newly created neutral Germany in 1949 too much.
Wallies come up with the idea of getting Louis Ferdinand (son of ailing Wilhelm III, who will die in 1951) to assume the throne of a new, peaceful Reich that has no territorial claims but makes Germany a respectable constitutional monarchy. Louis Ferdinand, as a very young man, is ideal in this role.
German people vote on it and it narrowly passes.
Hohenzollern Germany by 1955.
Possibly ASB (Stalin's proposal being accepted is pretty dodgy anyway), but it's a shot.