Given the next story is (Probably) going to be more grounded by necessity, I don't think whatever conflict is going on will be quite as world-shaking as Endwalker's and thus less controversial by nature.

A divide between the peace-seeking Garleans and the others stubbornly clinging to their patriotism and the old ways seems like an obvious direction they could go in and would provide a different flavor of political conflict from what we got in Heavensward and Stormblood. It would also provide an alternative means of providing the Garlemald-focused expansion they had originally been planning on before they decided to resolve the current story arc sooner then later.