Well, in my scenario Austria would be a German ally and Russia a French ally (I think this is the most likely scenario-Austria and Russia have major conflicts of interest in the Balkans, and Germany is IMHO most likely to side with Austria)
Russia still wanted to further expand into Ottoman territory at this point (and even take Constantinople, or at least ensure free passage of its ships through the Bosphorus), so the Ottomans would probably be forced into the British/German camp for their own protection. IOTL, the biggest European investors in the Ottoman Empire were Britain and Germany, and they would be allies with each other ITTL.
As for the rest of the Balkans, Serbia is a definate Franco-Russian ally, Greece is a probable Franco-Russian ally (historically they had a good relationship with the British, but at this point, many Greeks still wanted to achieve the Megali Idea*, and would likely support anyone who promised to help them). Assuming the Balkan Wars go as OTL, this makes Bulgaria a probable German ally (they wanted territory controlled by Serbia).
Italy is the real wildcard-they want territory from France (Nice, Savoy, Corsica, probably Tunisia) and Austria (Trento, south Tyrol, Trieste, the eastern shore of the Adriatic), and an alliance with either is plausible.
*Unification under Greece of all "historically Greek" territories. What was considered "historically Greek territory" varied-the most extreme forms of the Megali Idea called for Greece to take all Anatolia-but it usually included OTL Greece plus Thrace, Constantinople, and the eastern shore of the Aegean Sea