Here is a good assessment of the Syrian situation by James Corbett:
Bottom line? Whatever happens, Bashar al-Assad is on the way out. If he's lucky, they'll let him live.
Unless they pack him off to an ICC jail cell, where he very well may die while waiting to stand trial for his alleged crimes against humanity.
Dear Bashar - Don't believe any promises the US makes, unless they promise to kill you. That one you can count on.