Unless the US and Israel are prepared to kill the leadership of the IRGC, and in significant numbers, nothing will change. They will slip away, just as the Taliban did during the 20 years, 20 long years, the US and its allies sat on land in Afghanistan.
As soon as the allies got fed up and left, the Taliban came back, as if they'd never gone. This is the fate that awaits Iran. The religious fanatics who run the country will move across the border into Pakistan and stay there, safe - just as Osama Bin Laden was given sanctuary - until the US gets fed up or distracted by something else - Cuba perhaps - and its attention drifts away, just as it did in Afghanistan.
There is no sign of any kind of organisation, a government in waiting, poised and ready to run Iran in place of the mullahs.
All that lies ahead of the poor, secular leaning, Iranian populace is more oppression, more terror and more cruelty. If there is a God he definitely doesn't like Iranians.