There have been hints ever since the summer that Bon-Bon might get in deep with the dark stuff — what Professor Shane (David Alpay) calls Expression. Kat Graham teased E! Online recently by saying, "I can tell you that Bonnie is going to take a different turn and is going to make some choices that are going to affect the rest of the characters. It's really, really huge.”
Maybe that means going to the dark side, destroying the cure, or battling with Silas. If she does have to tangle with that ancient witch, could she survive such a magical duel?