One character sure to be more prominent in the Twilight sequel New Moon, is Victoria, the evil vamptress whose menace overshadows final scenes of Twilight. Offering a taste of what's to come, Rachelle Lefevre, who played Victoria in Twilight, talks to Variety about motivations that go beyond simple vengeance and were only hinted at in Twilight:
I see Victoria as someone who believes that vampires occupy a rightful place at the top of the food chain and she is very much obsessed by this power. For her, the fact that a vampire should be killed to protect a mere mortal goes against the natural order of things and so by killing Bella (and the Cullens who protected her) she is restoring order and balance to her world.
The second and third movies, she hopes, will give her the opportunity to explore this in more depth.