Powerless (partially found pilot of NBC sitcom; 2016)
Powerless was a sitcom created by Ben Queen for DC Comics in 2015, and sold to NBC for broadcast sometime May 2016; starring Vanessa Hudgens, Danny Pudi, and Alan Tudyk, it was about a team at Wayne Security, who specialized in products to help the victims of superhero/villain battles. Inbetween the original pilot being produced and broadcast, DC Comics decided to retool a large majority of the show, resulting in the final pilot, which aired in February of 2017.
The show's original pilot differs quite a large amount from the aired version. Greenlit in August 2015, it was about a superhero insurance company (RetCon Insurance) that paid out people caught in the middle of superhero attacks, led by Emily Locke (Vanessa Hudgens). Among other smaller changes were character additions, removals, and personality tweaking.
The pilot, in full, was previewed at San Diego Comic-Con 2016, and a trailer with footage from the original pilot was leaked shortly after, but the full pilot has yet to be released to the public. When asked about the possible release, the shows creator said that Warner Brother's wasn't interested in releasing it. A script for the original pilot was also located on a website dedicated to television pilots.