The name refers to one Nathaniel Essex, or Mister Sinister, one of the most formidable villains of the X-Men universe.
DC slate and Disney’s Marvel branch, Fox’s X-Men universe has been somewhat lost in the fog of war.
If Sinister has his hands on Wolverine’s blood, could he be attempting to create a second version of the clawed mutant?
One already teased by the mysterious post-credits sequence featured at the end of X-Men: Apocalypse; in which a man is seen to retrieve a vial of Wolverine’s blood, labelled Weapon X, before it placing inside of a briefcase alongside other, differently coloured vials of blood.