With Grindelwald defeated, the Fantastic Beasts were finally able to return to their own world. However, their troubles were not yet over, for a new enemy soon emerged: Emperor Voldemort. With the help of the Dark Book, Emperor Voldemort had traveled back in time and taken control of both worlds. Simon and the Fantastic Beasts soon found themselves in a desperate battle against Emperor Voldemort and his forces. Despite their best efforts, they were unable to prevail against the powerful wizard and his allies. Just as all seemed lost, a powerful force from the Marvel universe arrived to help them: the Avengers. With the help of the Avengers, Simon and the Fantastic Beasts were able to finally defeat Emperor Voldemort and his dark forces. However, the victory was short-lived, as Emperor Voldemort soon returned, even more powerful than before. With the help of their newfound allies, the Fantastic Beasts and Simon were able to finally vanquish their enemy and restore peace to both worlds.