As the battered fleet of Emperor Borca returns to Castarian the vultures are beginning to circle what looks like the finished carcass of his reign. Two Barons have already announced they are the true Emperor and have begun fighting each other. Borca's House is staying out of the fight, no doubt hoping the 2 Barons cancel each other out. Fighting is raging across the capital planet.
Borca still has a powerful backing, his Chosen Men still have some potency. Indeed the biggest threat to Borca probably comes from his own house.