Willy Wonka and the Great Glass Elevator

Note: Please do not add "Jack Albertson died in 1981" or "Gene Wilder died in 2016", because this was thought of before their deaths.

Willy Wonka and the Great Glass Elevator would have been a sequel to 1971's Willy Wonka and the Chocolate Factory which is based on the 1964 novel Charlie and the Chocolate Factory and the second film was based on the sequel novel of the same name by Roald Dahl. The film was going to have Gene Wilder reprise his role as Willy Wonka and Jack Albertson return as Grampa Joe. The film was going to be written by David Seltzer who re-wrote the script for the first film.

Plot
The film was going to be faithfully based on the novel.

Why It Was Cancelled

 * 1) Roald Dahl disliked the first film so much that he refused to allow a sequel to be made.

Results

 * The film was permanently cancelled.
 * The film will remain as a book.
 * The second book will be adapted as part of the Netflix animated series.