Trivia for the entire film series and/or franchise:
All-Star Cast: If you've taken a look at the character section, you will see why. Averted in that it's a lot of recognizable names, but no overwhelming star power, as apparently finding the perfect voice for each characters was more important than who to name-drop on the adverts.
Approval of God: Cressida Cowell, when asked, showed no offense or anger at the differences the movie had from the original novel (tone, setup, etc.) — she acknowledged that it worked better for the new medium, and that the story stood strong on its own despite not adapting the books' narrative more strictly. On her blog, she said that her favorite scene was when movie Hiccup first met movie Toothless.
Channel Hop: With DreamWorks Animation jumping from studio to studio over the years, each film in the series will be handled by a different studio. The first movie was released by Paramount, and the second movie was released by 20th Century Fox. Universal (who bought DWA in 2016) handled distribution of the third movie.
Follow the Leader: The Arena Spectacular was obviously made fresh off the heels of the Walking With Dinosaurs Arena Spectacular success, and opted to make their dragon animatronics in the style of the dinosaurs (i.e. with realism in mind).
