How will this play out? I think there are two basic scenarios. The first is that the Revolutionary Guards somehow get a grip on the country. It’s hard to imagine, but they do have lots of guns, and if they can kill hundreds of their own, they may well be willing to kill thousands of political opponents and normal citizens. I think the country has gone beyond the point where the tens of millions of suffering Iranians will put up with that again. But you never know.
The second scenario is that the regime implodes, unable to make decisions, unable to act decisively, and, as one key leader after the next goes over to the other side, the whole ugly thing collapses into the muck. Unlikely? Perhaps, but then it seemed even more unlikely back in the days of the Soviet Empire before it sank.