Batman: Arkham City's cage-fighting Robin is set to crack some skulls in the game's Best Buy-exclusive challenge maps on October 18. Just a few weeks after that, though, even fans who don't go the BB route will have the option to reenact Robin's take-downs when Mattel releases its Arkham City Robin/Joker two-pack.The two-pack is currently slated for a November release and can be pre-ordered at sites like Entertainment Earth. Part of the Batman Legacy line, the figures join the Arkham City Batman and Two-Face pack that arrived in stores this summer. With any luck, AC's playable Catwoman might join the line soon.