Mind. Blown. And the plot thickens!!
I assumed Bill had the animatronic copy from the first film because: 1) His Hocus Pocus credits are on the first film not the second film, and 2) He always teases opening the book but never shows you what's inside.
See this example. He's rigged up some spooky lighting now and always cuts off the videos early.
THEN, on one of his FB posts in 2020 that featured a fake poster for a new movie, he says he hopes it was happening AND
that they came to scan his book for the 2nd film.
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So that makes me think he had a non-screen version from the first film kicking around (or maybe, like you said, he had one but touched it up somehow, perhaps for the scan?) Regardless, it seems his copy is not from the second movie but the first -- and those inconsistencies are what carried over into the second film. Seems to be a Disney pattern, immortalizing the imperfect versions of it - i.e., first on the Blu-ray cover, now in the second film lol
I've also seen him post these pictures of it going back to 2015, long before the 2nd film was twinkle in Disney's eye. Here are some of them.
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Anyhow, you can guarantee I'll be glued to this thread and any future threads you start. Excited to see the progress!!