Mojtaba Khamenei has been proclaimed as the new Ayatollah.
He is reportedly in hiding after being injured.
The political landscape in Iran is shifting dramatically.
Briefing: Iran: A 'Nepo-Ayatollah', the 'Hubris trap' & the costs of a 'very complete war'
Strategic angle: Mojtaba Khamenei, son of the assassinated supreme leader, faces challenges amid political turmoil in Iran.