There is no way there won't be another Twilight book and movie! Upcoming releases=upside surprise.
Compare Hunger Games domestic box office to ANY Twilight movie. LGF was very smart moving the Hunger Game sequels to the pre-Thanksgiving Day slot! I would be surprised if any of the sequels have less than 405M domestic box office. Don't forget DVD sales for each and every movie plus the eventual 4-movie box sets.