http://www.hollywoodreporter.com/news/mipcom-doctor-who-writer-reboot-738300"Metal Hurlant is an iconic comic and the wellspring from which a lot of fledgling U.K. comic talent took their inspiration," says Mathieson. "Without Heavy Metal there would be no 2000 A.D., no Judge Dredd..."
Ummm.....no. I can see the then young turks like Mike McMahon, Kev O'Neill etc being HM-influenced in 1977, but anyone else? Not really. Especially the Dredd founding fathers.
Also given that 2000AD stories have always had a) plots and b) a disappointing (for some round here) lack of women characters' clothes falling off at the first excuse, then it's difficult to see the HM influence running through prog history.
Interesting fact: The US Heavy Metal sells some astonishing amount by subscription, and an equally astonishing proportion of these go to addresses in the US prison system. Why? Because porn is contraband material in prison, but HM is the next best permitted thing...