Here’s some scoop from E!Online’s Spoiler Chat:
Harrison: Can. Not. Wait. For The Vampire Diaries to return. Can you tell us what’s up with Jeremy seeing the dead chicks? How long will they be on? And does this mean things are over with Bonnie?
Nothing like some “dead chicks” to really liven up the place, eh? I’m hearing some very good things about that storyline—It’s gonna be twisty and turny and cool. Also hearing Malese Jow (Anna) and Kayla Ewell (Vicki) will be in about a handful of episodes (somewhere around six) and they will be recurring throughout the season. So you’ll get some fun “dead chick” splashes there for a while, but they won’t be around enough to muck things up with Bonnie. Win-win-win.