I don’t have a crystal ball, but I’ll predict it won’t be ISIS or the so-called Free Syrian Rebels that take over Damascus. It’s likely going to be the already entrenched government apparatus, which is run by the Syrian Ba’ath party. The idea of ISIS or Islamic caliphate takeover is unlikely.
The point is, the idea is slim of anyone taking over without an extreme bloodbath and repression beyond anything the younger Assad ever practiced