What next after the killing of Ismail Haniyeh?

Hamas leader Ismail Haniyeh was killed in a predawn strike in Iran, dealing a significant blow to the group. Analysts say this assassination ends the chances of an imminent agreement. With Yahya Sinwar expected to remain commander in Gaza, potential successors Khaled Meshaal and Khalil al-Hayya emerge. The killing, coupled with a strike on a senior Hezbollah commander in Beirut, raises fears of escalating regional conflict. Analysts suggest Israel's actions had backing from Washington.