IESB has an interview with Bryce Dallas Howard.
Read the full interview here.
Excerpt below:
Q: What did they doing to your look for Eclipse, since you are stepping in to play an already established character?
Bryce: I’m wearing a wig for that film, so that there’s a very grounded visual continuity for the character, which is critical.
Q: Isn’t it a bigger role in the third film?
Bryce: Well, as written in the book, Victoria becomes the primary predator of Bella in Eclipse.