No it is not based on a true event.
No, there is not a fourth Lion King film.
The film The Lion King was directed by Roger Allers and Rob Minkoff.
"The Lion King"
The Lion king
Roger Allers (co-director of the Lion King film) and Irene Meechi (co-screenwriter of the Lion King film) wrote the book for the Lion King stage musical.
No, "The Lion King" is not based on "The Chronicles of Narnia" by C. S. Lewis. "The Lion King" is a Disney animated film that was inspired by the Shakespearean play "Hamlet" and African folklore.
Simba
Well, The Lion King and the African Epic of Sundiata do bear story similiarites, but the filmmakers stated The Lion King was based on Hamlet and the Joseph and Moses stories on the DVD bonus features of The Lion King Platinum Edition DVD. Since the filmmakers didn't mention the African Epic as an inspiration for the film despite its similiarities, the storyline for The Lion King wasn't officially based on the African Epic of Sundiata.
Titanic grossed more than The Lion King as the film grossed about $1.8 billion while The Lion King grossed approximately $783.8 million.
The Lion King
Edward Hibbert is the voice of Zazu in The Lion King
The Lion King: Six New Adventures was released shortly after the original Lion King film was released in 1994.