A wacky theory about Trelawny's part

[Beth in Sacramento]

Okay, I have been combing through websites upon websites, and I still 
haven't seen any evidence who will be playing Professor Trelawney, or 
that we will even HAVE a Trelawney. Considering how important her 
role is in books 3-5, I refuse to believe that Cuaron would have cut 
her out completely.

Which leads me to this unlikely and farfetched theory:
On Mugglenet.com, I noticed that in the cast list for the third 
movie, an actress named Sally Mortemore seems to be billed as playing 
Madam Pince (the librarian). This struck me as noticeably odd, 
because I have read PoA twice, and I don't remember any instances 
where Madam Pince did or said anything even remotely important or 
memorable enough to make it into a movie. The actress has appeared in 
the previous HP movies, as a nameless background ornament (you might 
see her at the teacher's table during the grand hall scenes). So why 
would they give her any billing at all, placing her up with the ranks 
of Lupin, Snape, and the rest of the teachers?

My wacky theory is this: Perhaps Cuaron has re-written the script 
because he likes Ms. Mortemore and wanted to give her a bigger part; 
therefore he transferred Trelawney part to Pince, so the creepy 
predictions and airy-fairy demeanor will still exist, but they will 
be played be a different teacher (it's kind of like when Hermione 
asked McGonagall to describe the Chamber of Secrets, when in the book 
it was actually Professor Binns who had this honor).

What do you think?

Beth in Sacramento