TwiExaminer- Ms. Amanda Bell "So over the past few days, when discussions about The Twilight Saga: Breaking Dawn filming in Rio De Janeiro, Brazil have surfaced, Taylor Lautner's name has been attached to them, and in some instances Mackenzie Foy's has as well.
Of course, Lautner portrays Jacob, and Foy is to portray Nessie/Renesmee. Lexicon notes, "fans are speculating if true, it’s a part of a dream sequence or Bella imagining Jake on the run with Nessie."
[This post is riddled with spoilers, by the way.]
This sounds about right. Except that the first idea can't be true because in the book, Bella doesn't know Nessie until she is a vampire (having dreamed of a baby that was a boy, and certainly unaware of the connection the child would have with Jake before it actually happened). And vampires don't sleep; so they don't dream. The second notion may be it, though - an imagination of some sort.
So, I looked throughout the third book in Breaking Dawn for some clue as to why the two characters would need to film in Rio, and here's my thought (please do share yours in the comments):
On page 673, there's a moment in which Bella has prepared the paperwork for Jacob and Renesmee to escape (via J. Jenks - you remember that part, I'm sure), and she has a hope that Alice and Jasper, who she knows are in South America because they have sent Zafrina and Senna along to help, will be of assistance to them.
Then I stared at the blank ivory page for a full five minutes, concentrating on my decision. Alice might not be able to see Jacob or Renesmee, but she could see me. I visualized her seeing the moment, hoping desperately that she wasn't too busy to pay attention.
Slowly, deliberately, I wrote the words RIO DE JANEIRO in all caps across the page.
What I'm thinking is that Alice might visualize the decision and the result - Jacob and Renesmee in Rio. That would explain them bringing Taylor Lautner and Mackenzie Foy along for the Isle Esme ride in Rio, wouldn't it? Of course, it could be a whole lot more creative than that - Bella visualizing the two gallivanting around in peace in Rio, Alice picturing meeting up with them in Rio (by that logic, Ashley Greene and Jackson Rathbone would have to head to Rio, too, I suppose), etc. Still, the concept that this is a vision of some sort is strong, and it also lends credibility to reports which suggest Lautner (and potentially Foy) might join the others in Brazil.
It's just one idea, and of course there is nothing official to say Lautner actually is going to Rio. But you hear things often enough, and it makes you wonder. Looking at the books, this seems like a plausible explanation."
I have seen this possibility mentioned in the comments section, as well. Again, there is still no official word about Taylor being in Rio, so... we all just have to wait.