Haruhi goes batshit insane, and then...what, exactly? Tries to kill Tsuruya? Tries to kidnap Kyon?
Plus, there's Yuki, who's been MIA since the end of part one, and is also showing signs of going yandere. Would she save Tsuruya and Kyon? Would she save Kyon only? And what would she do concerning Haruhi?