Look for a wide selection of Batman, the Dark Knight toys, collectibles, and other items. This includes adult and kid costumes, action figures, and LEGO play sets. You can also get accessories, such as weapons, costumes, and vehicles, to use with the action figures you already own.
Make sure to also get Batman, the Dark Knight adversaries like the Penguin, Riddler, and Joker so you have someone to fight against. Jump in the Batmobile and fight some crime.