Add a new villain who is close to the devil incarnate and digital effects to the already horrifying extraordinary make-up of the zombies, and what will you have?

A more gruesome, sinister and brutal season for the next installment of the highly-popular AMC original franchise The Walking Dead which has set October 11 as its official release date.

The Walking Dead make-up effects artist and executive producer Greg Nicotero revealed that the next season of the series would involve the adoption of digital effects to make the walkers more grotesque and decayed.

Nicotero told The Hollywood Reporter, "We're doing a few things we haven't done before, which is digital augmentation of couple of walkers. We're moving noses and putting a cavity there. Taking the area underneath the ribcage and shrinking it down. Kind of Bernie Wrightson style. That stuff is what makes it more exciting because it gives us more opportunities."

Bernie Wrightson is a celebrated comic artist and illustrator.

The creators of The Walking Dead have accepted that make -up and prosthetic effects to cover a real human body can only go so far to depict a decaying body. The digital effects could do more, Nicotero said but added they would not be replacing practical make-up effects.

"Every season we sort of refine [the walkers]," Nicotero said. "We refine the teeth even more and we just keep changing it up, and every season it's been different and we just keep pushing it a little bit more. It's been really fun. We sculpted full muscle arms and then we added sagging flesh off of them as everything is about to drip off. [Showrunner] Scott [M. Gimple] has one very specific thing that he is conscious of, which is that it can't be a Ray Harryhausen. It can't be a walking skeleton. It always has to be muscles. It always has to be something that is motivating the movement."

AMC Secretly Casting For Evil Villain Negan in The Walking Dead Season 6

There have been wild rumors and speculations that the evil villain Negan will be introduced in season 6 of The Walking Dead. In the comics, Negan is the ruthless and brutal leader of a group of survivors called "The Saviors."

Negan's group of "The Survivors" was able to penetrate into the Alexandria Safe-Zone immediately after Rick takes over the community. And in the comics, readers would know that Negan mercilessly killed Glenn. That's bad news for Glenn and his fans if he will be one of the major characters to be killed in the upcoming season.

The rumor of Negan's appearance was further fueled as  TV Line reported that AMC is secretly casting a role which "sounds a lot like Negan," who will appear in The Walking Dead season 6.

TV Line writes, "The show is quietly casting a Season 6 role that sounds a lot like Negan, the comic book character who ends up killing [Spoiler]. The breakdown describes 'Rich' as a fifty-something narcissist who has an angry streak, a 'Senator-like charm' and the charisma of a car salesman. Totally Negan, right?"

The Walking Dead season 6 will premiere on 11 October 2015 on AMC.