As much as I think a series would have been better for adapting the books, I just don’t see this working out, personally. There is too much the films got right that would be practically impossible to top. Alan Rickman? The entire Dursley family? The Hogwarts Express? Robbie Coltrane? John Williams’ indelible theme? How could it work without these things? Hell, they couldn’t even really replace Richard Harris, in my opinion. Michael Gambon did a fine job, but he was an actor first and a servant to the story second. He didn’t play his Dumbledore as an extension of Harris’, he didn’t know the source material (which is fair, the script should be all an actor needs, so it’s more a fault of the script and direction, but still), and he came across as somewhat inconsistent. One movie he just sort of muddled about, then the next he’s shouting, then he’s back to being silly ol’ grampa Dumbledore. Anyway, my point being that, it’s far too soon and these characters and films are far too impactful to be replacing them already. They aren’t like Bond or Batman or Sherlock Holmes, where new stories can be told and new perspectives can be had. The films did a good job capturing the spirit (if not a lot of necessary details) of the books, and that’s that.