Just saw that N.K. Jemisin won the #Hugo for best #scifi novel again. Will book 3 of her trilogy win next year?

Just saw that N.K. Jemisin won the Hugo for best novel again. Book one of the trilogy won last year and book two this year. Will book three win next year? Should the award be only given out to standalone books and series be only eligible for the new best series award?https://t.co/x4uzz047wR