At the end of "The Honorable Ones," there's a brief moment that seems to foreshadow the change that Kallus undergoes in season three (taking over the Fulcrum moniker to feed the Rebels information and ultimately defecting to their cause). Before Zeb returns to The Ghost, he turns and bows to Kallus. Kallus had been sheltered behind a rock, but he steps out into the sunlight in order to return Zeb's bow.
His coming into the light prefigures the events of season three, as Kallus slowly moves from the darkness of the Empire to the light side embodied by the Rebellion.
Taken an-other way, the sunrise illuminating Kallus's face represents the beginning of his enlightenment. He eventually starts to understand what the Empire truly stands for.
