"In an interview with Guardian, Arkham City director Sefton Hill said that the game will be 40 hours long. The main campaign accounts for 25 hours of that time. There's also around 15 hours of optional story content that players can tackle whenever they want"
This is great news for us Bat fans.
"This makes City much larger than its predecessor, Arkham Asylum. Hill says the gameplay will evolve significantly over time to keep the game from growing stale."
Arkham City will be released the week of October 18th for the Xbox 360, PS3, PC.