We get several scenes of Emma Corrin as Cassandra Nova in the trailer. In the comics, Nova is the evil twin sister of Charles Xavier, who we know as Professor X. While in the womb, Xavier became aware of his evil counterpart, who was more of an “anti-self” (an entity that was equal and opposite to himself). Xavier destroyed Nova in the womb, causing his mother to give birth to a stillborn. However, Nova survived as a clump of cells and slowly regenerated her body until she was whole and dedicated her life to killing her brother. Yikes. She is an arch-nemesis of the X-Men. For those who watch X-Men ’97, Nova was the one responsible for the Genosha genocide in the comics, and is a main piece of the “Xavier in space” storyline as well, so I’m hoping that the cartoon show will tie into Deadpool & Wolverine.