How one kid in a Batman costume conquered San Francisco

The streets of San Francisco came to a still in November 2013 when five-year-old Miles Scott donned a Batman costume and took to the streets to tackle the city's crime. More than 20,000 San Franciscans stopped to watch and cheer him on, many holding up signs that read "Save Us, Batkid!" and "Batkid is our hero!"

Miles wasn't just any kid in a superhero costume, though. He'd been diagnosed with leukemia and was in remission; his crime-fighting spree was organized by the Make-A-Wish Foundation. Miles wanted nothing more than to be Batman, so the foundation, the city of San Francisco and a veteran game developer made it happen.

Filmmaker Dana Nachman is now making a feature-length documentary about Batkid, and she's raising funds on Indiegogo to finish the film. The documentary, which has a $100,000 funding goal, will tell the story of Miles himself; his family and their struggle to deal with his diagnosis; and his big day as Batkid.

The trailer for Batkid Begins: The Film, which was teased at Comic-Con, can be viewed below. Check out our Comic-Con stream for our coverage from the weekend's event.

How one ex-game developer helped grant Batkid's wish to save Gotham City