Thanks to IGN, we have an update on the The Dark Knight sequel.

At the moment, Christopher Nolan is the only screenwriter attached to the project. How does IGN know this?

Studios and guild members are required to submit work lists to the guilds of the projects they are on. The website has learned that a work list from Warner Bros. was submitted last week, listing Nolan as the sole screenwriter on eventual follow-up to The Dark Knight.