If you are taking away the reason they paid so much money then of course it won't fit its budget when including the amount they paid for just the rights. It was $250 million for the rights and $450 million for s1 production. Also an adaptation of an author's work is a subjective thing. Remember son of the author didn't like the last adaptation even though many fans did.
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That is still just as silly of a definition as some of the others. Canon is simply the official facts of a story. It isn't something a fan decides but what the author, or the owners of the IP, decide. Just like when Disney bought Star Wars they started their own canon even for the EU that was "official but not movie level" of canon.