The last season of ABC Family's hit teen drama thriller "Pretty Little Liars" ended with the reveal of "A," as previously reported by HNGN. But viewers should brace themselves because show creator Marlene King said that there's a new big bad in town and this villain is even more "lethal" than "A" was.

"The new big bad - I won't say if it's a he or a she. We think it's a he right now, but you never know," King told Hollywood Life at the New York Comic Con earlier this month. "But the new big bad is more lethal. The new big bad isn't playing a game. The new big bad has an agenda and will not stop at anything before that agenda is taken care of."

In the mid-season finale episode, it was revealed that the villain known as "A" was really Ali's brother, Charles DiLaurentis. Charles transitioned to Charlotte DiLaurentis (also known as CeCe Drake) while at the Radley Sanitarium, where she was sent after attempting to drown Ali as a child.

But now that there's a new villain in the mix, King said fans should still keep an eye out for the evil "A."

"I think everyone's a threat," King told Hollywood Life. "Everyone's a suspect in the show, always."

Season 6B of "Pretty Little Liars" will premiere on Jan. 12 on ABC Family's newly re-branded network, Freeform.