The campaign will focus on Zeratul finding a way to bring the Protoss together while dealing with the fact that he murdered his lover Raszagal.
There are cinematics depicting Zeratul's nightmares of seeing his warp blade pierce through his lover's heart.
Zeratul has been retconned to be the same age as Raszagal.
As Zeratul tries to bring each Protoss faction together he meets a potential love interest. He'll have a lover among the Khalai, the Nerazim and the Tal'darim. He must weigh his decisions in his heart as much as his mind if he wants to unite as many Protoss as possible.
There are missions where Zeratul seeks out Raynor and Kerrigan asking them for help on how to deal with his conflicting emotions.
Amon and the Hybrids are irrelevant until the last mission. Majority of the missions will by PvP and involve Zeratul fighting one of his lovers who think he cheated on them.
The story will end with Zeratul becoming the Patriarch of Protoss after marrying Raszagal's sister and making her the Matriarch.
The Protoss won't kill Kerrigan after Amon is defeated because she helped Zeratul with his love issues. Instead they'll thank her by giving her a machine that will allow her to temporarily retake her human form each month. Thus she can continue her relationship with Raynor.