OotP: cut info's impact on future books?

[aro76]

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are there still people who haven't seen this yet!?
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As with the previous movies, I'm always rather interested to see what
has been cut from the book and how - and when some detail or plot line
from a book is cut from the movie, I assume that it was not going to
be a major point in future books.

If my assumption holds any water, I found it most curious that Regulus
was NOT mentioned during the Black Family Tree scene. I'm not
sure what that means for what, I think, many readers theorize is the
identity of R.A.B. in HBP. Another red herring or will this be
addressed in future movies? Thoughts?

-- Amy
*Okay -- I'm going back into lurk mode now*