Yep look for the parallels to what happened in 1979. What will the army do? When they turned on The Shah, it was all over.
I would think the army is under lock and key with the mullahs and it would be exceedingly hard to do anything. If the army had or could have any effect on the regime it would have occurred in the 10 year cluster F with the Iran- Iraq war. This is not like Egypt where the army was already independent and certainly not beholden to the Muslim Brotherhood. But maybe there’s a hero in waiting.