Right now, I am brewing up a overarching plot for Roth Roryn as that will help come up with House Redoran, House Hlaalu, and Imperial Legion quests to implement in the area.
What I propose is to focus on the “heresies” of old and new, as the region would be more than likely the first place the Old Velothi settled. And because of the backwater-ness of the province, a more isolated heresy of Dunmer religion has survived as the Indoril did not do much there while they were in control, with other Great Houses that controlled it also did not pay much heed to it.
The overarching plot is the interaction of the Great Houses and other outsider forces with the old traditions and ways of life of the Velothi that have lived there.
However the idea is kind of barebones at the moment which is why I am posting this in the conceputalization area.