Victorious

Victorious was originally planned to be the third and final book in the Villains trilogy. However, V.E. Schwab revealed that while writing Vengeful, she had made the decision to merge her ideas for the second and the third book, making the series a duology instead of a trilogy[1]. She has not ruled out the possibility of a third book, though if such a book was written, it would happen in the distant future[2].