Turkey would get rid of a decades long insurgency, gain far more territory than it gave up. Russia would keep what matters to them. Alawites would have their own state, Assad would remain, Israel would share a border with Turkey, Kurdish State
The Deal of the Century: Redrawing the Map of the Middle East
There is no end in sight for the Syrian War because both sides have a lot of fight left in them. This is due in part to the fact that losing is not an option for either and both sides are being financed by oil money.
What started as a civil war in 2011 quickly escalated in a sectarian war between Shiites, (Iran, Alawite Syria and Hezbollah) and local Sunnis aided and abetted by Saudi Arabia and other Gulf states and from time to time Turkey. Almost from the start, President Obama backed the ouster of Assad by Turkey and some Gulf states with the intention of installing the Muslim Brotherhood to run it just as he installed the Muslim Brotherhood to run Egypt.
