The documentary opens next month in select cities before Warner Brothers releases it nationwide in July.
It's the story of Miles Scott, a Northern California boy with leukemia who was able to live out his wish to be Batkid thanks to the Make-A-Wish Foundation, which turned San Francisco into Gotham City for a day.
That day brought people in the Bay Area together for a good cause, with thousands pouring into the streets in a show of support.
PHOTOS: Batkid plays hero for a day in San Francisco
Click here for information on how to make a child's wish come true.