Speaking to DigitalSpy, Millar shared the following details about Kick-Ass 2---
"People who've read the comic will know that the second one ends on a cliffhanger. Hit-Girl's been arrested and she's in prison, Dave has lost his dad and he's kind of destitute. The third one will be set two years later, and it's about where their lives are now, picking it up from there."
Millar also stated that costumed vigilantes have sensibly been outlawed yet a few heroes still operate despite societies wishes---
"I used to love Marvel Comics where the cops were chasing superheroes, seeing them as menaces because they're not licensed in any way. So I kind of like the idea of bringing that back, because in reality there's no way a cop or a fireman is going to let a guy in a suit run into a building. I like the idea that after they have stopped a mugging they have to run away for the police. That old-fashioned superhero thing."
Millar also went on to say that Volume 3, which will be released in 2013, will bring his and Romits's work to an end. Of course the sequel to the film is just beginning to ramp up and there's always a chance that the solo Hit-Girl series could continue (if her character survives Volume 3).
Kick-Ass is a 2010 black comedy superhero film based on the comic book of the same name by Mark Millar and John Romita, Jr. The film was directed by Matthew Vaughn, who co-produced the film with actor Brad Pitt, and co-wrote the screenplay with Jane Goldman. The film's general release was on 25 March 2010 in the UK and on 16 April 2010 in the US.
The film tells the story of an ordinary teenager, Dave Lizewski, who sets out to become a real-life superhero, calling himself "Kick-Ass". Dave gets caught up in a bigger fight when he meets Big Daddy, a former cop who, in his quest to bring down the drug lord Frank D'Amico, has trained his eleven-year-old daughter to be the ruthless vigilante Hit-Girl.
Despite having generated some controversy for its profanity and violence performed by a child, Kick-Ass was well received by both critics and audiences. The film has gained a strong cult following since its release on DVD and Blu-Ray.
On 19 February 2012, Millar revealed that the sequel is scheduled to begin filming in the summer of 2012.