Civil war would be super fantastic, but I'm not sure how that would look in engine or with the background info?
There's a hard line between dynamic one-off game events and static npc game assets (region sovereignty, station ownership, characters, etc).
If they implement FacWar style changes across all of the region borders that could work perhaps? This is why I've always wanted sec status in systems to be a dynamic thing they can slider up or down for IC or player reasons.
It's also a huge, huge undertaking with hundreds of star systems and an enourmous backlog of lore to keep up to date if the slightest thing changes across the board.
IE super neat if 4 heirs commit suicide but I have sympathy for the Mercury crew that have to write 4 new bios and change all the references to the heirs
My bet is there will be a new emperor but the other heirs aren't going to go along with it for reasons (tm).