Now, before I go on, let's talk about this "Cure". The cure is hinted in season 3. It's hinted when Esther says she can turn her childern(Orginals) back into humans. Now, "After School Special" is the start of the Silas Chapter of Season 4. And, Season 4 is stated to explore where Esther learned her magic and the ORGIN of the vampire spell. Now, being a vampire means being immortal, right? Silas is stated to be the creator of the immortally spell. What if someone esle used the spell to create the vampire spell and taught it to Ayana and taught it to Esther. This person could of been Quetiysah who wanted to get revenege on Silas who cheating on her.
This now connects to the question if Quetiysah is Bonnie's ancestor. This could mean that Ayana could be related to Quetiysah, and that was how she learned the vampire spell.
Now back to the point of this discussion: the war. Now, like any war in history, it's caused by something-or someone. What if this season one of our beloved characters turns evil? The first major person I would like to focus on is Elena. *SPOILER WARNING READ AT OWN RISK* In "We All Go a Little Mad Sometimes", the hallucation of Katherine tells Elena that she is turning into her. To those who don't understand this, Elena COULD turn OFF her humanity. Also, what if Elena tries to kill Caroline because of what she tells Stefan? Nina Dobrev stated that two main characters will die this season. We've lost Alaric already, that's a sign that anyone can die. ANYONE. If Elena turned off her humanity, she'll have the mind to get the hell out of Mystic Falls, forcing Klaus to follow, which means, Katherine can back. That would be a table-turner, wouldn't it? Julie Plec said that Katherine wont come back to Mystic Falls until Klaus is no more a threat there. He cant kill anyone because of this formula: WEREWOLF + HUMAN DOPPELGANGER BLOOD= HYBRIDS! If he kills someone Elena loves, she will, how do I put this, FLIP OUT!! Now, back to freaking Cure.
Does the Cure actually exist? Remember the Sun and the Moon Curse? That was lie created by Klaus in order to get vampires and werewolves to set up the stage for him to become a true hybrid? Speaking of hybrids, Tyler. Will he LIVE through his forced encounter with Klaus? Or will he live by finding out information for the Cure and using it against Klaus?
Now, back to the Cure. Again. The cure is one of the main factors for the war in Mystic Falls. Everyone wants it, but, can it cure werewolfs? Hayley worked with Shane for info on her parents, but, what is she helped him for info on the Cure and if it can cure werewolfism? That would spark tension with Klaus because of the formula I stated earlier. If there are no werewolfs, there are VAMPIRES to use to become hybrids. That means every single vampire character is up for grabs.
Now to Silas, to read where this part of my theory is from, click the link: http://www.starpulse.com/news/Alan_Danzis/2012/12/24/7_burning_questions_after_the_vampire_
Silas: The myserty man yet to shown. What is his race? Why does Shane love him so damn much? But, here's the most important question: will he unite every character in TVD. Could he be the series villian that makes fanfiction writers dreams come true?: Stefan's Team and Klaus's Team unite?
Now, pleade, everyone has their own theories and opions, this is one of mind. I dont mean to start a war on this wiki.