For the latest season see Season Five News and Spoilers.
The doppleganger prophecy will be readdressed by the end of the season. 
Wesley will direct Episode 18 of Season 5, airing later this year, and he said the hour is “both nostalgic and suspenseful.” “It feels like our world, but something is a bit askew. It feels uneasy. And I respond to that,” Wesley added.
But the actor’s behind-the-scenes role doesn’t mean the episode will be short on Stefan. “It’s not Stefan-light, but it’s also not Stefan-heavy,” Wesley said of his character’s screen time in Episode 18. “I’d say it is somewhere in the middle.
There will be another flashback scene.
"It's now, how do we get out of this?" Dries says. "Elena is dealing with the turmoil and emotional damage left in Katherine's wake, but Elena is also dying, this virus is killing her. Two of our main characters have this incurable virus and they want to kill everyone, so what do they do? Our guys will have to make a deal with the devil to save their friends."
We're done with Matt/Gregor story, but we've introduced the Travelers and we're going to kind of pepper them in throughout the rest of the season leading toward the finale and explain why they've existed this season and why we're just hearing about them now. So once we kind of finish learning about Augustine and Whitmore and Damon's backstory we're going to open the door to the Traveler mythology. So we're not done with them yet. 
Big trouble, warns executive producer Caroline Dries. “Part of her personality now is that she carries this cross,” says the EP. And while she seems to be managing every dead supernatural being passing through her now, those unexpected “visitors” may “become an issue for her,” teases Dries. The ex-witch’s relationship with Jeremy will face some challenges, too. “No relationship on this show is safe for too long. They’re going to hit some speedbumps.”
Juicy storyline coming up for Stefan that I can’t spoil, but I promise it will be good.
That said, she will definitely have more story coming up [in which] she’s trying to figure out who she is and what her identity is as a witch who can no longer practice magic, and we’ll see her find another purpose in life.
Then past that towards the end, we'll start to understand how the doppelganger prophecy as believed by the Travellers [works], what it means for the remaining doppelgangers and we'll be unraveling the mysteries of the Travellers and how it's going to impact our heroes and the rest of Mystic Falls
She’s going to start intersecting with the Traveler agenda. We’re also going to meet some new witches that are going to take a particular interest in her despite the fact that she can no longer practice magic. As we get closer to the end of the season, she becomes quite integral not just to the plan to save herself and her friends from danger, but also to – in an exaggerated and yet, appropriate, phrase – save the world and everyone.
Candice Accola says. "We're [also] going to have a big wake-up call to the new mythology we've slowly gotten to learn about over the season with the Travelers, as well as the who, the what and the why of it all." Let me guess, they're not part of a traveling circus?
Stefan is moving on from Elena after this whole Katherine chapter closes, he’s trying to figure out the next big movement in his life. And since his brother needs him more than ever, Stefan will be the one to kind of pick him up — in a very Stefan kind of way.
Any chance for another crossover with The Originals before the end of the season? I don’t think we have anything in the works right now. There’s something special we’re trying to do, but I don’t know if it’s going to pan out, so I won’t spoil it.
Stefan is very focused on Damon and so their bonds grow stronger, but then something huge happens that might potentially tear them apart. It’s a big plot twist.
‘Who am I? How have I changed?’ Aaron was Elena’s friend and it’s like, ‘How is that going to resonate with Elena and is that something she can forgive?’ I think the answer will surprise everyone.
I love their friendship too. Yes, I would say that their friendship will continue to strengthen and more so as the Traveler mission starts to clarify. We’re going to bring in these Travelers as a more predominant villain force for the last chunk of [The Vampire Diaries ] Season 5. And as the Mystic Falls gang comes up against them, Stefan and Caroline are kind of taking them on together.
"What we've been trying to do with The Travelers is keep this undercurrent of danger through the whole season, but not quite explain what they're doing because — shocker! — it will impact all the characters in a negative way," she says. "[Near the end] of this season they'll make their agenda known and their leader will come forth."