There will be chaos. Imagine Libya but ten times worse. Israel will bomb regularly to maintain instability and the Americans will be pitting groups against each other, with the Saudis and UAE backing ISIL and other extremist groups. If the Shah’s son does get into power, he will need to rule with an iron fist, with the backing of the US, as people still remember the tyranny of his father’s regime. Expect him to bring back the dreaded secret police his father used to have, with arrests, torture and disappearances. Meanwhile, the diaspora in the West, who are chanting for regime change won’t actually go back to live there again