So in the latest beta build they have added the title "Chancellor".
CharTitle #420 - Chancellor ...
I'm going to go out on a limb and say this title will be the next reputation title. It seems appropriate.
I wonder how many exalted factions this title will take, if it is related. "the Beloved" took 60 exalted factions, which is quite easy to achieve.
I'm thinking 75 exalted factions.