I'm going to set this here to start things off:
So, the big reason why I posted this is because it talks about the lore of the Never Beast--mainly, for the lightning storm the Never Beast could conjure that could destroy Pixie Hollow. With the way that those pictures looked, the ones that Nyx showed the Queen... I wouldn't put it past Gruff. His anger and need to create the four towers could overpower his friendship with Fawn...
Now, in terms of the books, and the lore behind that that...
Pixie Hollow first started in the Golden Age, which is when the movies are set--Pixie Hollow is huge, has all four seasons, the Pixie Dust Tree is still making lots of Pixie Dust for all the fairies...
In
Tink, North of Never Land, a storytelling-talent named Tor is telling the story of the fall of the Golden Age of Pixie Hollow. Apparently, some unnamed "dark force" comes to Pixie Hollow and destroys the Pixie Dust Tree. Without the Tree's magic, Pixie Hollow begins to shrink, fairies can't fly, and they begin to fear for their existence: without their magic, how can they survive?
And then they find Mother Dove, a simple dove sitting on her egg in a hawthorn tree not too far from where the Pixie Dust Tree once stood. At first, she's just an ordinary dove. Then, a great fire starts in Never Land, and burns everything in Pixie Hollow, including the dove. But instead of burning into ash like everything else, the flames give her knowledge, and magic. Mother Dove is then able to teach the fairies how to grind her molted feathers into Fairy Dust--not quite as powerful as Pixie Dust, but can still give the fairies enough magic to fly and perform their talents. The Home Tree then grows back where the Pixie Dust Tree once stood, and fairies begin to thrive once again.
Since the topic of how the Pixie Dust Tree is destroyed is so vague (probably because the Disney authors wanted to give the movie directors enough room to "destroy" Pixie Hollow how they wanted without completely going against what had been written down), there is a chance that
Legend could be the connection to the books, especially with the rumors going around that this could be the last one.