But that is all it ever was just possibly it was never confirmed until that point in the film.
It's hard/almost impossible to keep such an open set such as City Hall tighter. People were recording from windows in apartments. In a soundstage Nolan has complete say about who is on the set.
Like I said before the fact Nolan lost his cool at the reporter and that he had Marion deny in interviews that she ever filmed such a scene or that she was more than Miranda is a sign that he wanted the character/scene left a secret.
Also they never say "Ra's Al Ghul's daughter" they only say "the child of Ra's Al Ghul". However, Nolan does give away that it is not Bane very early on in the prison scenes but you have to pay close attention to timelines in order to see that. The people who I was with in all of my showings didn't see that and they thought it was Bane until the review (other than someone wo was alos following production closely).
At least he didn't film Talia stabbing Batman with the knife out in the open yea? Cause if that was the case, I would easily agree with you.
Also, if I remember correctly, Nolan lost his cool when a reporter asked about the ending, not the reveal. "Obviously you can't ask that, you'll ruin the ending" or something like that.
Yes, he could've filmed in on a soundstage and used CGI to bring her back in, but is it really worth it when that time could be spent working on other special effects like the football stadium and the Bat?
Anyway, the people really affected by the confirmation of Talia are really those who followed the set videos and etc. Yes, you didn't see them, but the advice wasn't directed to you, it was to everyone in general.
Is it also that big of a reveal? Ra's Al Ghul appears in the film after all. If it wasn't going to be a random villain working with Bane, it was always going to be Talia.
Yes, Marion had to deny she was Talia multiple times. Some people were always going to believe she was Talia no matter what she said officially anyway. Some of us believed her and just accepted that there wouldn't be Talia. There were two female leads, one of which was already Catwoman. The fans wanted the other female to be Talia and they had their faith rewarded. After all, what good would it do if Marion confirmed she was Talia? It takes away some of the magic of the movie. And if she confirmed it, it'd be all over the news and things will escalate from there.
Marion gets nothing from confirming she was Talia especially if they had to compromise by filming her walking to the Tumbler on location.
Anyway, hopefully that was coherent enough as I'm kinda tired at the moment. Happy to discuss more later.