Iran has been arming SAA to the teeth for a reason, they will be the ones to fill the gap and compensate the Russian vaccum.
Syria is in ruins now but stronger than ever, anyone undermining Syrian Arab Army will taste the consequence of her miscalculation. SAA is a missile power in the Middle East, they are capable of striking the whole Israeli territories and also the NATO lapdog in the North, they were the ones that annihiliated the brotherhood filth in the heart of Middle East.
Again, for sure, SAA will be the one in charge of Syria.