The article says:
And he now looks with dismay on the way the superhero genre in which he once worked has eaten the culture. “Hundreds of thousands of adults [are] lining up to see characters and situations that had been created to entertain the 12-year-old boys – and it was always boys – of 50 years ago. I didn’t really think that superheroes were adult fare. I think that this was a misunderstanding born of what happened in the 1980s – to which I must put my hand up to a considerable share of the blame, though it was not intentional – when things like Watchmen were first appearing. There were an awful lot of headlines saying ‘Comics Have Grown Up’. I tend to think that, no, comics hadn’t grown up. There were a few titles that were more adult than people were used to. But the majority of comics titles were pretty much the same as they’d ever been. It wasn’t comics growing up. I think it was more comics meeting the emotional age of the audience coming the other way.”