Conroy announced the news during a Dallas Comic con, saying the following:
"I can talk about it now," he said during a panel. "We've been working for about nine or ten months on the next Arkham game. We all signed contracts so we weren't allowed to talk about it. The studio likes to completely control the rollout of any product, so they don't like us to talk about anything, but it's now been announced.
"It's an unbelievable game, I still can't say anything about it, and you don't want me to anyway because it will ruin it for you, but it's amazing. It's a huge, huge cast, and a big story. It took almost a year of writing to put it together. They've been working on it a long time."
The game will be launching on October 25th, for the PS3, Xbox 360, Wii U, and PC.