Credit: YouTube

The story of the little California boy with leukemia who transformed San Francisco into Gotham City for a day is now being made into a documentary in the hopes of answering the question: Why were so many people transfixed by Batkid?

Miles is now entering first grade, and his cancer is in remission.

The moviemaker of “Batkid Begins” and her crew will also be taking part in a panel to discuss their film at Comic-Con in San Diego on July 27.

See the trailer below and get more details at!