Arabs are in need of leadership. They don't have any strong religious populist leaders. Key word here being populist.
To be an Arab populist you have to win over Arab tribes across the region.
Right now you don't have any public figure that meets that criteria besides the new Syrian President. He also has good ties with Hamas. His base does. Syrian Ikhwan and Palestinian Ikhwan are quite close in the US.
He also has good ties to Arab monarchies.
For him to gain more influence, it depends on what happens in Syria over next few years.
There may be other more private figures that just aren't out in the public political landscape yet.
If Ahmed Sharaa and Syria can allow more cooperation between Islamists and Monarchies, more dialogue,more and more influential figures will come out. The religious guys are more private in the Arab world for fear of persecution.
This change in state of affairs will mean we will see more Islamist populist figures come about and out. With more tolerance between monarchs and Islamists. And ultimately in the long term this brings about the character of the Mahdi or some guy who will have the name of Mohammed Abdullah, that may be from one of the well one tribes and also be from blood line of the Prophet that the Arabs will unite around