The Syrian army will use or attempt to use chemical weapons on the Syian rebels, thus causing international outrage. The Iranians, Russians, and Chinese will have to withdraw their support for Assad. This will allow th installion of a democratically elected dictator.
Overthrowing unfriendly/unstable governments and installing soft dictators is our current policy. See, Tunisia, Egypt, And Libya.
There are numerous articles coming out now with concern about Syria using chemical weapons. Turkey is requesting NATO missle defense systems in fear of chemical attack. These articles are being floated in advance of the event IMHO.
And no, the US has no clear plan and is not even executing a viable plan. Total complete failure. They lost control of Ghadaffi's WMD and Man Pads. East Libya is under control of the Muslim Brotherhood. Egypt is under control of the Muslim Brotherhood. And Syria is being attacked by Islamic Terrorist Insurgencies funded and armed by the US and NATO. That is not soft tyranny. The US and NATO are now sponsors of international terrorism. That is current US Policy. Promoting, sponsoring and funding terrorist insurgencies all across the Middle East and Africa. And the results are and will be horrific.