I'm not seeing WWI as "inevitable". There were several factors that made war more possible, but its not like the people who marched off the war in 1914 did it entirely on purpose. It was a mixture of negligence, arrogance, chance, and some semi sinister players.
By 1917 you'll be in a situation where the CP definitely wouldn't want war (because factors were too much in Entente favor) and by 1920 AH may break up without a war. That causes an entire re-alingment of diplomacy.
In addition the naval arms race, which already Germany had given up on a few years before WWI, would be a distant memory.
That a war might happen in a re-aligned world perhaps, but 1914 was probably the year in which political and military factors were most in favor the war we got.
In 1914 the situation was already in the Entente's favor and that was the reason there was a war.
When the French realized that in 1912 they went to an offensive strategy and pushed the Russians to do the same funding additional railroads to speed up a Russian invasion. In 1917 they have an even better situation and just need a pretext, expect the Serbs to provide one again just as Franz Ferdinand is trying to make AH a federation against Hungarian opposition...
...only that it would not get to that, because:
Say OTL WWI didn't happen, because Franz Ferdinand isn' killed because his driver doesn't make the wrong turn.
How would the upcoming Greco-Turkish War play out?
Venizelos planned to have a preemptive attack on Constantinople via Gallipoli (which at the time had little defenses, the attack would be a complete surprise, the Greeks were throwing there best at this not their scraps like the Entente did, the Greeks had prepared this invasion for months not a month like he Entente had, and this was led by the extremely competent Metaxas). THey hoped they could quickly capture Constantinople and that then the Great Powers would intervene and end the conflict. Would the Great Powers end it?
Could the Greco-Turkish War turn into WWI or would the complete political messiness of supporting one side prevent that?
I doubt the Greeks would go at it alone, but if they do expect the Russians to try and snatch Istambul first and in doing so break the Entente.
It had been British policy to shore up Turkey against Russia, when Grey went for appeasement and made a deal with France and Russia he promised in 1907 to assist the latter on getting better access to the straits, but when the Russians went to collect in 1909 Grey got cold feet and rebuffed them, in order to avoid a worse embarrassement the Russians blamed it all on the Austrians creating the well known crisis.
Remember that when the Bulgarians appeared to be close to reaching Istambul the Russians gave repeated warnings about taking the city itself!
In that context, expect them to go ahead and occupy the straits regardless of any opposition or even Greek occupation, after all, by entering the Entente Europe was their only way available for expansion and the straits were the golden apple, seeing it go to a minor European country would be just too much, and in that context the CPs would applaud and support the Russian actions in order to break the Entente, Turks be damned.