Input (grade 12): In late July 2006, the sequel was officially confirmed as The Dark Knight with Nolan at the helm and Heath Ledger joining the cast as The Joker, Batman's arch-enemy.
Output (grade 12): In late July 2006, the sequel was officially confirmed as The Dark Knight with Nolan at the helm and Heath Ledger joining the cast as The Joker, Batman's arch-nemesis.