Even though the article was on the dilemma of Ashley Greene and Kellan Lutz's salary from the movie, this is what they said:"Ashley Greene and Kellan Lutz, two of the Twilight co-stars that were in a heated battle with Summit Entertainment over the deal points for the fourth and fifth installment of Breaking Dawn, have signed their
sources say. It’s not clear which party buckled and both sides are sure to have their spin, but we can confirm that we’ll see Green back as Alice Cullen for the last two Twilight films. And hunky Lutz
will also return as Emmett Cullen for the conclusion of the epic franchise. Bill Condon is directing and production is set to begin in the fall. Summit Entertainment would not confirm the deals. Peter Facinelli, Jackson Rathbone, Elizabeth Reaser, and Nikki Reed will also be back for Breaking Dawn."
Hope it's true!Source