Vader is basking in his own silence, all aside from the rhythmic  robtic sounding breathing from his helmet. While normally he would be doing at least something, in this place it was all beyond him now. Soon his son would be fully by his side and the Emperor would fall beneath them both. But could he really set his son down the same dark path? Such questions should not arise within his mind, but he finds the thoughts still lingering.

"Soon the time will come."

He spoke outloud to himself and no one else. Soon the Empire would be within his grasp. Soon his son would stand by his side. And soon would peace be restored by his making. He would have control over it all.