In reply to a fan question on Twitter, J.K Rowling has let us know that the form Newt’s patronus takes is a large spoiler for future films:
Big spoiler. https://t.co/kmwXNaOEtT
— J.K. Rowling (@jk_rowling) April 26, 2017
Does this mean Newt has to go up against some Dementors? Or perhaps he uses it as a shield against an Obscurus? Or, perhaps we finally get to see the Lethifold that was cut from the first movie:
[…] the Patronus is the only spell known to repel the Lethifold.
J.K also took the opportunity to let us know she is still working on re-writes for the second film which begins filming later this Summer:
I’ll know tomorrow morning, when I read the rewritten bits I did today 😱 https://t.co/Cu2ZUICv1X
— J.K. Rowling (@jk_rowling) April 26, 2017