Even though director Matthew Vaughn (X-Men: First Class) has two upcoming sequel projects on his schedule, he's chosen to add an original film into the mix.   After landing a sneak peek at the book, Vaughn put up his own money to option Lexicon, a thriller from author Max Barry that is due to hit shelves next year.  Vaughn would also write (or at least co-write) a script he plans to direct if the picture goes through development.  Set in a world where words can literally kill, Lexicon includes Barry's signature riffs on branding, identity and government control.  Hit the jump for more on Lexicon and a recap of what else Vaughn has on his plate.Deadline reported on Vaughn's pick up of Barry's Lexicon. The picture takes place in a contemporary setting where members of an ancient, secretive organization wield words with the power of persuasion, a power strong enough to be a deadly art.  Lexicon follows the group's most gifted member, a troubled young woman who breaks her society's rule by falling in love.  Before anything will proceed with the thriller, Vaughn is tasked with directing the follow up to the hit mutant movie, X-Men: First Class. That should be an easily bankable box office with superhero fare running at a fever pitch and current it girl, Jennifer Lawrence, returning for the sequel (with hopefully a bigger role this time around).  Speaking of big stars returning to their roles, Chloe Moretz is expected to make a return in some capacity as Hit-Girl in Vaughn's sequel, Kick-Ass 2.  Vaughn is attached as a producer on the follow-up with Never Back Down director, Jeff Wadlow, at the helm.