Board Thread:Episode Discussions/@comment-32617252-20180429034507/@comment-33372361-20180501114110

Hidan did not get revived in the Fourth Shinobi World War because he never truly died (he was immortal after all). He was instead dismembered, incapacitated and buried on the Nara clan forest where Shikamaru stated that only members of his family could enter.

That might have been the reason why Kabuto did not manage to gain possession of him, even though he had the skills to "put him back together" since he was a skilled medical nin.