Ben & Holly's Little Kingdom: The First Movie

Ben & Holly's Little Kingdom: The First Movie was a planned film based on the TV show of the same name. It was set to be released in 2015 but due to similarities and script issues, it led to the film getting cancelled.

Plot
When Holly is framed for stealing a museum item when she didn't actually do it in real life, she and her father are placed in a dungeon until otherwise said. It's up to Ben and Queen Thistle to find the missing museum item before Daisy and Poppy turn the kingdom into an apocalypse.

Why It Was Cancelled

 * 1) Mark Baker & Neville Astley didn't like the script due to it sounding way too similar to The SpongeBob SquarePants Movie.
 * 2) Sony Pictures Animation wanted to avoid competition with Hotel Transylvania 2.
 * 3) Some of the actors from the show decided to not reprise their roles due to either hitting puberty or they didn't feel like it.
 * 4) Entertainment One spent 25 million pounds on another season of Peppa Pig.

Results

 * 1) The film was permanently cancelled.
 * 2) The concept of a kingdom turning into an apocalypse would later be used for Blazblue: Continuum Shift II (2021).
 * 3) Hotel Transylvania 2 was the only Sony Pictures Animation film released in 2015.
 * 4) The script can be found online.