Background Pony #6ABD
Prediction: The movie is going to start with a book opening with a voiceover (maybe Twilight, similar to how FiM's voiceover was Celestia) saying "Once upon a time, in the magical land of Equestria..." again, just like the first episode of FiM but instead of explaining the story of Nightmare Moon it'll talk about the Mane 6 and about how something bad happened to them, causing Equestria to split apart.