well, i could imagine an "anschluß" in 1949, then. because 2/3s of austria (much less the eastern part alone) wouldn´t be a viable nation.
The russians would propably give their part as a kind of federated province to tschechoslovakia, so uniting tschechians and slovaks against the new third nationality.
the western part: although the prospect of austria as a german state in the FRG looks kind of bizarre to me, at least for the Americans it should have brought up no problem.
other thought: what if de Gaulle, in his goal (what a pun) to create a french.controlled rhine frontier, offers not only Southern Baden and Hohenzollern, but also the Innsbruck-centered french occupation zone for the rhineland, would the British accept?