Possible? I think some mutiny events would be great, or perhaps following regicide, if that were implemented. Lore-wise there seem to be founding leaders and additional leaders for most civilizations. Like Grey Fox's Commanding Officers project, mutiny could be a way to add some sense of chronology to the civs.
This seems like something that could have already been discussed in Vanilla, but a quick search didn't lead me to anything.
This seems like something that could have already been discussed in Vanilla, but a quick search didn't lead me to anything.