The future of the Syrian Air Force will only become apparent once the political situation in Syria sorts itself out. No matter what, however, it will be greatly diminished for the near future, even if Assad remains in power. With the need to rebuild, Syria will not have the money to invest in its air force, which it has long ago neglected in favor of other branches of the military.
The SAF will certainly suffer immensely if an Islamic government, hostile to both the west and Russia, comes to power. An alignment with Russia is more likely, and that will improve the SAF's prospects. But with the cold war over, it will be some time before it becomes a significant force. A western-aligned government will probably not need a strong air force, as such a scenario diminishes the chances of any confrontation with Syria's immediate neighbors. In short, it's hard to see the SAF becoming formidable enough to offer any challenge to either the IDFAF or TuAF, at least in the coming years.