I've been rereading the same handful of Redguard sources every couple of years since the last game. If the next one really does head west, the books already did most of the setup.
The short version is that Yokudan history sits there with very specific gaps. The "Pocket Guide to the Empire, 1st Edition" (the version still on UESP) lays out the exodus, the sinking of Yokuda, and the arrival in Hammerfell with dates that line up too neatly to ignore. The same text flags the old Ra Gada wave as something the current Redguard population still argues about internally.
Then you get the in-game books that actually name the players. "Words of the Masters" and the scattered notes around Sentinel point to ongoing friction between the Crowns and the Forebears that never got resolved in the Third Era. Add the brief mentions in "The Firsthold Revolt" about Redguard mercenaries and you have a province that already has two factions, old grudges, and a history of hiring itself out. None of that needs invention.
The timeline gap is the part that feels deliberate. We know the Battle of Red Mountain hit in 1E 700. We know the Yokudans arrived a few centuries later. What we do not have is a clean account of what they left behind or what they found when they landed beyond the basic conquest story. That silence is where a new game could sit without contradicting anything.
I keep coming back to the same three threads whenever this comes up on the forum. First, the status of the old Yokudan gods after the move to Tamriel. Second, how much the Empire still actually controls the southern coast after the events of the Great War. Third, whether the remaining Dwemer ruins in the region even matter anymore or if they've just become local scenery.
The pillar thread already tracks the official statements, so I won't rehash those here. This is just the canon side that has been sitting on the shelf since Redguard and Morrowind.
Link to the standing TES VI reference: https://elderscrollsforum.org/vi/p/1-tes6-everything-we-know
If you're new, the intro thread is still the easiest place to start: https://elderscrollsforum.org/vi/d/101-introduce-yourself
So which of those three threads do you weight most when you reread the Redguard material? And does the silence around the old gods feel like setup or just an old omission?