The Divergent Series: Ascendant

The Divergent Series: Ascendant was a proposed sequel to The Divergent Series: Allegiant, which was slated to be released in the June of 2017, but ended up 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 at the box office to Zootopia.

Result
The film was permanently cancelled. It was reworked into a TV movie with an all different cast.