Shaby,
Well, not quite true, btw.
http://en.wikipedia.org/wiki/Balkan_Pact
It was mostly founded on Bulgaria-retention rationale.
If Hitler "trades" within this Pact's framework, he could take hold on the Balkans without to be necessary to invest military and economically there.
Imagine a Pact between the Axis and the Balkan Pact.
Turkey remains formally neutral, but is promissed to get back the Near East if certain conditions get realized.
Romania, Yugoslavia and Greece are allowed / obliged to occupy / take control over Bulgaria. With each of them are agreed post-war territorial changes on expense of Bulgaria.
To Romania the Ruse-Razgrad-Shumen-Varna line.
To Greece - more of Upper Thrace and the southern half of the Bulgarian Blacksea coast.
To Jugoslavia - Western Bulgaria.
With the Balkan pact on Axis side, Hitler does not need Hungarian support and Hungary is stomped too.
Albania is split between Italy, Yugoslavia and Greece. Italy takes about 80% of Albania. The three sign no-territorial-claims agreement.
Bulgaria is stomped like OTL Poland by its Axis neighbours.
The Bulgarian government-in-excile in London formally joins the Allies after the country's neutrality is violated by the Balkan Pact intervention.
With all the Balkans either on Axis side or occupied by the Axis, Turkey is braver and in 1942-1943 de facto joins the Axis war efforts in Africa and Near East.
The Allies temporary loose the Eastern Mediterranean.
The war is couple of years longer and goes nuclear in Europe, too.
&
As in OTL geopolitical situation USSR is contained from easy access to the world Ocean.
ITTL Cold War "capitalist" ( and NATO ) countries are: Slovenia, Croatia, Albania, Greece, Bulgaria and Turkey - those who have access to the important seas
&
Warsaw Pact ones ( sacrificed by the Allies to the Big Red Monster ) are:
Hungary, Serbia, Romania, Kurdistan - all Landlocked ones.
Similary to OTL Finland and Austria - Tsardom of Bulgaria remains neutral during the Cold War. No civil war, because the Great Powers do not have interest to intefere and to change the status quo.
In 1995 joins the EU.
In 2012 is still a monarchy because until 1955 is headed by a Regency Council due to the fact that Simeon the Secong is minor in age and there are less incentives to depose a kid from the throne.