The Divergent Series: Ascendant

The Divergent Series: Ascendant was a proposed sequel to The Divergent Series: Allegiant, which was slated to be released in June of 2017, but ended up being cancelled.

Plot
It covers the second part of the Allegiant book.

Why It Was Cancelled

 * 1) The film was cancelled when The Divergent Series: Allegiant lost money at the box office to Zootopia.

Results

 * 1) The film was permanently cancelled and the filmmakers tried to rework the film into a TV movie with a different cast, but its network Starz announced in December 2018 they were no longer seeking to develop it into a television movie, citing the lack of interest from the cast and with Starz and Lionsgate executives.
 * 2) The Divergent film franchise ended up being a trilogy.