"I never thought that our first meeting in a hundred years would be like this," Hades said.
On the mountain of the gods, Hades finally met his brother, who had been sitting on the throne of the god-king for tens of thousands of years. However, the tense situation John had imagined did not occur. Instead, Hades and Zeus were talking and laughing, making John momentarily believe it was all an illusion, that Hades had never intended to rebel and had simply tricked everyone.
But John had misunderstood.
The reason for the apparent calm was that the conflict between the two sides had escalated to a point of no return, where they could no longer agree or understand each other. This realization brought a sense of release.
They both knew that attempting to persuade each other was impossible, so they didn't waste their breath.