Well, there's finally an end date in sight: the final chapter, The Twilight Saga: Breaking Dawn Part Two, will officially open in US cinemas on November 16, 2012 (one year after Part One). The Aussie release date will most likely be around the same time, if not the same day.
If you do the math, that's over two years from now. Eclipse had such a strong box office showing that I doubt the franchise will slow down anytime soon—but two years?! That seems like an awfully long time to keep fans' attention. Do you think it can keep its momentum all the way to the end?