[DiapDealer]

I know I would much rather an author simply write more material rather than try to retcon what people read through after-the-fact "word of God" proclamations.

But just as much as I believe that, I also believe it is a reader's responsibility to keep their own "canon." If the books suffice for you (rhetorical you), then let them suffice. Don't seek out extra-book proclamations or confirmation of your interpretations of what you read. You don't have to read what Rowling (or anyone else) is saying about a finished product. It's OK to separate a work from its creator and their musings.

It's not possible for an author to "turn me against" books of theirs I've already read and enjoyed. No matter what comes after. I do listen to what some of my favorite authors have to say. Just not so much what they have to say about their own finished works. Those book experiences are now mine. I won't suffer their creators' attempts to retroactively affect, alter or refine those experiences. I simply don't care what I was "supposed" to take away from them.

I'd see this play, though (and maybe even read the script). If it was close by and I could afford it, of course. But rest assured; whatever I thought of the play would have no effect on my feelings about the Harry Potter book series. That's a done deal. Nor do I care if future fans' first experiences of the series is not based on the same "canon" as mine was.