Hell hath no fury like the Joker scorned.
This is a combination of the the Batman: Death Comes to Gotham panel and a bit of the DC New 52 panel, focusing on Batman the highly anticipated Joker story arc that affects all the Bat-family.
Scott Snyder gave the New York Comic Con audience a peak inside the twisted mind of the Joker and a glimpse into this dark arc. In short, Joker is the jester and Batman is the king. The Joker went away for a year and he’s upset with Batman because he thinks he has been weakened by his new Bat-family (Nightwing, Robin, Batgirl, etc.) They have made him lazy and fat and he’s back in Gotham to make things right again.
The Joker serves Batman to make him stronger. In order to make Batman stronger, he plans to kick his ass, turn his world upside down and kill his family… but it’s all out of love. Joker believes Batman will be a better king if he survives what’s coming his way.
The point of a jester is to bring the worst news to the king and make him laugh about it. It just so happens that the Joker is not only the bearer of bad news, but also the reason for it. The villains serve Batman, not his Bat-family. The Joker wants to show Batman that the villains are the ones that truly love him. To prove this to Batman, Joker plans to kill his family.
The Joker attacks members of the Bat-family by targeting their greatest weaknesses. He’s been watching them all and he knows what they are most afraid of. He’s going to take their deepest fears and make them very real for everyone. Each attack is personalized. Despite the connected arc, each book in the Bat-family stands on its own. Both Scott Snyder and Greg Capullo warned the audience that this storyline isn’t for the faint of heart, and if you’ve read Batman issue 13, you’re already well aware of that.