4. A Good Balance Of Creatures & Plot
The fictional textbook itself - "Fantastic Beasts and Where To Find Them" - is an encyclopaedia of creatures, so Rowling will have to weave a new story instead of transferring it from book to film. That being said, fans want to make sure we get our fill of magical creatures this time around. All things considered, the Harry Potter movies were lacking in magical creatures compared to their presence in the books. We want to see Newt encountering these magical beasts and see and feel his awe of them. We want to see the things regular, non-magic using folks (muggles) aren't meant to see. We want that privilege.