What development in the plot brings Brando joy at the end of Chapter VI and why?

At the end of Chapter VI, Brando experiences a state of near glee when he sees Luismi being escorted toward the cell where Brando is locked up. The reason for his joy stems from the fact that he is looking forward to the damage he will inflict on Luismi, even before he enacts his long-held plan to murder him.