As for what they'll be about, we've already heard that many of the characters will be returning and writer/creators Matt and Ross Duffer want to stick with these kids to see them grow up, while also digging deeper into the mysteries surrounding this small town in Indiana.
Another major part of the first series was director/producer Shawn Levy and he's been chatting about what to expect from the upcoming season with Southern Pacific Public Radio.
Collider grabbed some quotes which are vague enough but exciting all the same while Levy talks about following up the success of the initial episodes:
He also mentions how the kids themselves have grown and changed a lot in the time since season one was shot, which is always a danger when using teens who are quickly becoming adults. With no specific timeline in place, they could skip a couple of years ahead to stay on top of those growth spurts.
Stranger Things season 2 will be out in 2017.