Yes, the movie "Shazam!" exists. It was released in April 2019 and is part of the DC Extended Universe (DCEU). Directed by David F. Sandberg, it follows a teenage boy named Billy Batson who can transform into an adult superhero by uttering the magic word "Shazam." The film is known for its lighthearted tone, humor, and family-friendly themes. A sequel titled "Shazam! Fury of the Gods" was also released in March 2023, continuing the adventures of Billy and his superhero alter ego.

The movie you are referring to is "Shazam!" released in 2019, which is based on the DC Comics character. It tells the story of a teenage boy named Billy Batson who can transform into an adult superhero by uttering the magic word "Shazam." On the other hand, "Kazaam" is a 1996 film starring Shaquille O'Neal as a genie who emerges from a magic lamp to grant wishes. So, the correct title in the context of the superhero film is "Shazam!"

No, Sinbad did not play Shazam. The confusion stems from a widespread false memory or urban legend where some people believe he starred in a film titled "Shazaam" as a genie. In reality, the character Shazam is portrayed by Zachary Levi in the 2019 movie "Shazam!" directed by David F. Sandberg. Sinbad is not associated with this character or any official movie called "Shazaam." The mix-up may have arisen due to his role in the 1990s film "Kazaam," where he played a genie, but that is a different character entirely.

The Mandela Effect in relation to "Shazam!" refers to the widespread false memory that many people remember a movie called "Shazam" from the 1990s starring comedian Sinbad as a genie. However, no such film exists. This phenomenon gained attention when the actual movie "Shazam!" was released in 2019, featuring Zachary Levi as the superhero. The confusion may stem from a blend of various pop culture references, leading people to incorrectly believe that Sinbad starred in a genie-themed film.