Who Will Kill Whom

This was a dark, gloomy tunnel. Batman walked through the long tunnel, able to hear even his own crisp footsteps. "Tap~" As he rounded another corner, countless silver-blue lights suddenly lit up on the surrounding walls. Batman examined them closely and realized that the walls were made up of countless display screens. "Welcome, our superstar." Joker's voice came from countless screens, each showing his pale, twisted face. "Oh, my dear Bat, you have no idea what surprises I've prepared for you.