So there isn't a lot of new information here, although adding a shopping mall to the small town of Hawkins, Indiana is a natural step.
The trailer also sees the debut of new character Robin, who is played by Uma Thurman and Ethan Hawke's daughter Maya Hawke.
Stranger Things season 3 is now under production, and Netflix is building the hype.
Executive Producer Shawn Levy voiced earlier this year that Stranger Things season 3 will take place in the summer of 1985, with Back to the Future - which premiered in 1985 - being referenced throughout the season.
For a show as deeply rooted in '80s ephemera as Netflix's Stranger Things, there's been a huge absence of malls. Stood alongside Steve in the food court's ice cream shop Scoops Ahoy, she doesn't appear to be all that excited by the prospect of starring in a commercial. As Stranger Things is Netflix's big show, I would expect they'd want to get the season out to be considered for next year's Emmys, but that's just my speculation.
That's about all we've got to go on just now, but it should get fans excited enough for the third season, which is likely to be out at some point in 2019. That may be frustrating for impatient viewers, but Stranger Things season 3 is coming. Season three also includes new characters played by Cary Elwes, Jake Busey and Maya Hawke, among others.
The trailer ends with by saying "coming next summer" which seems to hint at the eventual release date for the third instalment. Make sure you check out the full clip in the player below and let us know what you think.