LEGO Batman is a theme of LEGO building sets based on the comics, films, and cartoons featuring the DC Comics superhero, Batman.  Currently into its second wave, the sets feature vehicles, characters and scenes based on their standard accepted appearances in the comics. Many characters, such as Nightwing, Robin and Alfred have made their appearances in the sets so far, usually paired with vehicles such as Joker's helicopter, the Penguin's submarine, Scarecrow's biplane and Killer Croc's speedboat.