Brown has taken liberties with the whole basis of Christianity, and is being promoted as a film that will show you 'everything your father taught you about Christianity is wrong'. Brown has not clarified where his alleged facts stops and his fiction begins. If Brown is willing to admit there is nothing to the theory that Christ and Mary had a child and other such blasphemous claims, I might give him a pass. But the promotion of the book/movie indicate otherwise.
Please see post 42.