6 things we know are going to happen in 'Stranger Things' season 2

Stanger Things / Netflix

Netflix has announced that its hit series "Stranger Things" is returning for a second season in 2017. But fans still have a lot of open questions about where the plot will go.

So who's coming back? What new thrills do show creators Matt and Ross Duffer have in store for us? And are we returning to the Upside Down?

The brothers have thrown out some hints.

Here's everything we know so far about season two.

Season two will pick up a year later.

Though the Duffers thought about starting the story a full decade after the events of season one, they decided to stay close to what we saw unfold.

"There’s still things that are unresolved," Ross Duffer told Entertainment Weekly. 

Most of the main characters are returning.

Rejoice, people who loved "Stranger Things" for the same reason they loved "The Goonies"! The gang is back.

You can expect Will (Noah Schnapp), Mike (Finn Wolhard), Dustin (Gaten Matazarro), Joyce (Winona Ryder), Hopper (David Harbour), and many more from season one to return.

But it's still murky if Eleven (Millie Bobby Brown) will reunite with the other kids.

“We don’t know about Eleven,” Ross Duffer told EW. “We leave that up in the air.” 

There will also be four new characters.

Though the Duffers are staying mum on any specifics, EW reports that one episode in season two is titled "The Lost Brother," which might be an introduction to one of the new characters. 

“There’s going to be a lot of new and interesting dynamics that we didn’t see in season one,” Matt Duffer told The Wrap.