The Turks could take control of the rebel held areas of their border with Syria, a joint Arab force could try to cleanse eastern Syria of ISHIT. The Saudis along with some other Arabs are conducting a military exercise called Northern Thunder. The Egyptians sent a lot of hardware to that exercise, Jordan is involved too. If anyone has been listening to Bernie Sanders King Abdullah said that he wants Muslims Troops on the ground to clear out the terrorists. All of the regional countries want their troops on the ground, the ball is in the coalition leaderships court. One of the dynamics that complicates things in this war is its complexity, there are troops from Iran and Russia Operating in Syria if something happens where these regional countries but head with Iran and Russia the risk of a larger war is very high.