Phase Three: Revolt of the Redlands and the Year of the Many Emperors
Phase Four: Antirius Returns
Phase Five: The Empty Empire and a New Compromise.
Or something like that
Changing history requires some forethought, but nothing requires you to follow the campaign to its predestined end. You may decide to throw predestination to the wind, let any player-character become the Prince of Sartar, and maybe even allow someone else to marry the Feathered Horse Queen and become the King of Dragon Pass.In the end, this campaign is yours to decide what you make of it. In fact, there will be plenty of advice to do just that in what I am writing.