Warning: Spoilers ahead for "Stranger Things," including speculation of future events.
"Stranger Things" is officially renewed for a second season, and Netflix has already released a cryptic teaser hinting at what's to come. The teaser seems to list episode titles (nine in total this time around), but their vague nature leaves fans mostly in the dark about what to expect for the plot.
We looked back at the season finale and unanswered questions, and spotted five key plot points that might resurface in season two. Scroll down for a look.
The connection between Will, Eleven, and Hopper's daughter via stuffed animals.

In the season finale, Hopper and Joyce go to Will's secret hideout in the Upside Down. Hopper finds Will's stuffed animal, and is reminded of his daughter Sarah's stuffed tiger she had in the hospital.
But Hopper also found a stuffed lion in Eleven's prison/bedroom in Hawkins Lab. The toys seem too similar for it to be a mere symbol of childhood. Could there be a darker history that connects Hopper's family to Hawkins Lab? Perhaps his daughter's illness wasn't all it seemed to be.
When a Redditor asked if actor David Harbour (Hopper) knew Sarah's specific cause of death, Harbour replied: "Yes, but it's a secret we may explore in [season two], so don't wanna say right now."
What is Hopper really up to, and whose car did he enter?

Hopper seemed unsurprised when a car pulled up to the hospital, and an intimidating looking man opened the door for him. Season two may explore what Hopper is really doing, and who he is working for. There were multiple references to his time as a "big city cop," so we know he wasn't always a small town sheriff.
Perhaps Hopper is a former government agent, or perhaps he struck a bargain with Hawkins Lab in order to get access to the Upside Down. Either way, Hopper's story is far from over and we're prepared to learn more in season two.
Joyce broke her word, and is telling the world what really happened to Will.

At the police station, one month later, the camera panned over some newspaper clippings. In the one titled "The Boy Who Came Back to Life" (which happens to be a possible season two episode title) we learn that Joyce Byers has gone public with the truth.
"Joyce Byers alleges that Will was the subject of a secret government program run by the Hawkins National Laboratory," the clipped reads. "The allegation comes amidst a massive investigation into the hidden organization and its elaborate experimentations in perusal of mind control."
Before Hopper and Joyce were released and allowed into the Upside Down, Hopper made the terms of their freedom clear to Joyce. "We came to an agreement. Look — everything that’s happened here and everything that’s gonna happen — we don’t talk about," Hopper told Joyce. "You want Will back? This place had nothing to do with it. That’s the deal. You got it?"
Clearly she hasn't kept her side of the deal, and the fallout from that might be a big part of season two.
See the rest of the story at Business Insider