The road map is already clear. A fractious, unrepresentative Syrian National Council - Libya-style - is already in place. Same for a heavily armed Sunni “insurgency” crisscrossing the borders in Lebanon and Turkey. Sanctions are already essentially hurting the Syrian middle class. A relentless, international campaign of vilification of the Assad regime has been deployed. And psy ops abound, with the aim of seducing sections of the Syrian army to defect (it’s not working).
A report  by a Qatar-based researcher for the International Institute for Strategic Studies (IISS) even comes close to admitting that the self-described “Free Syria Army” is basically a bunch of hardcore Islamists, plus a few genuine army defectors, but mostly radicalized Muslim Brotherhood bought, paid for and weaponized by the US, Israel, the Gulf monarchies and Turkey. There’s nothing “pro-democracy” about this lot - as incessantly sold by Western corporate and Saudi-owned media.
Ivo Daalder, the Obama administration’s ambassador to NATO, has already ordered Libya to enter the Mediterranean Dialogue, alongside Morocco, Jordan, Egypt, Tunisia, Algeria, Mauritania and Israel. And early this month he told the Atlantic Council what’s needed for an attack on Syria; an “urgent necessity” (such as giving the impression Assad is going to raze Homs to the ground); “regional support” (that will come in a flash from the GCC/Arab League); and a UN mandate (it won’t happen, as Russia and China had made it clear).
So one may expect exactly that from the “coalition of the willing”; some black ops blamed on the Assad regime; immediate support from GCC/Arab League; and probably unilateral action, because via the UN is a no-no.