But now Scottish comic book writer Mark Millar is to show his softer side with a new project aimed squarely at younger children.
The author's latest book, Kindergarten Heroes, has already been snapped up by movie studio Fox and is headed for the big screen … even though it has yet to be published.
Instead of muscle-bound supermen or gun-toting Amazonians, the book details the adventures of the toddler offspring of superheroes and could be turned into a feature-length animation.
Speaking about his Kindergarten Heroes, Mr Millar said he was happy to take a break from the mayhem and destruction of his previous work.
He said: "All I'll say is that it does what it says on the box, which is that this is the kindergarten where all the superheroes leave their toddlers when they go on their adventures.
"We never see the parents, so we can assume these kids are the super-powered offspring of all your favourite heroes. It's very cute and their little adventures, in terms of tone, would be similar to Pixar.
"I'm trying to make it genuinely funny, genuinely exciting and genuinely dramatic when it needs to be.
"I'd like my readers to buy this for their kids or little brothers and sisters, but at the same time really enjoy it themselves."
Mr Millar said he and illustrator Curtis Tiegs are also "working on the sequel at the moment and will release both probably later next year … In the meantime, we're just having fun with it."
Mr Millar has enjoyed great success transferring his comics to cinemas, although so far his films have been strictly for grown-ups.
Wanted, the first of his comics to be turned into a film, stared Angelina Jolie and James McAvoy as deadly assassins and was rated certificate 18 in the UK.
He also worked on the subversive hit Kick-Ass and its sequel Kick-Ass 2. Both were hugely popular at the box office despite attracting criticism for profanity and violence.
The films, which told the story of everyday people who become vigilantes dressed as superheroes, featured scenes where gangsters are mown down by the protagonists in drawn-out gun battles.
Many critics complained that Hit-Girl, one of the film's most violent characters, was an 11-year-old girl, played by Chloë Grace Moretz. The character also used some of the strongest language in the film.
Its sequel, which was released this year to widespread praise, was disowned by one of its major stars who complained about the level of violence.
Hollywood regular Jim Carrey said he could "no longer support" the film in the wake of the Sandy Hook elementary school massacre in Connecticut last year, and refused to do any publicity or back Kick-Ass 2's release.
Millar later said he was baffled by the actor's response, adding: "Jim is a passionate advocate of gun-control and I respect both his politics and his opinion, but I'm baffled by this sudden announcement as nothing seen in this picture wasn't in the screenplay 18 months ago.
"Yes, the body-count is very high, but a movie called Kick-Ass 2 really has to do what it says on the tin."
Millar has also been hired by Fox studios to oversee its superhero films, which include the popular X-Men series but not the global box-office smashing Avengers films.
The writer Carter Blanchard, who has previously worked on the new Spy Hunter film and DreamWorks' Glimmer, has been signed up to produce a script for the film of Kindergarten Heroes, which has yet to go into full production.