Untitled Diary of a Wimpy Kid film based on The Ugly Truth

Untitled Diary of a Wimpy Kid film based on The Ugly Truth was a planned special, but got cancelled after the cast from the original Wimpy Kid Trilogy outgrew their roles (according to Diary of a Wimpy Kid wiki).

Cast

 * Zachary Gordon as Greg Heffley

Why It Was Cancelled

 * 1) The main reason why this film along with The Meltdown are the reasons why Zachary Gordon and the other cast outgrew their roles.

Result

 * 1) The film was permanently cancelled.
 * 2) Diary of a Wimpy Kid: The Long Haul was released in 2017 with a new cast, and was met with negative reviews.