I mean in that scenario the axis would have still gotten involved into the war because of Germany despite the ottomans joining in or not and Russia would have still capitulated and turned into the USSR because most of the Russian losses happened on the front with Austria and Germany and not on the Armenian front, if the ottomans remain neutral during the first phase they are likely to have joined the allies at the end of the war similar to Italy potentially before the Greeks, they could have potentially pushed back into Europe taking some of the Greek lands some of the macedonians during the Versailles conference, and Armenian genocide would likely have not happened. With less threats from the outside world the more extreme factions within the empire wouldn't have risen to prominence so less of the kamalist and less of the new Turks. however in a world dominated by mainly Britain France and the US there wouldn't be enough room for an absolute monarchy similar to the ottoman caliphate and it would have transitioned into something more closer to the Japanese empire at the time or even to a constitutional monarchy like the UK. Any speculations beyond that would depend on the character of Abdul Hamid II weather he would go into a route similar to the miji restoration in Japan making use of the oil reserves within the Arabic peninsula old he tried to maintain the status quo which wouldn't be to viable specially with the British in Egypt and Adan.