I think this would be a perfect team up. Be cautious. Possible spoilers for season 1 and 2 of Stranger Things ahead.
Investigation based game. Board tiles make up Hawkins and key locations.
Players have a selection of characters to choose.
Have a betrayer mechanic. Not in every game played. Optional or random.
Items and evidence and mystery unravelling.
A campaign would play out like a season.
Items could be influenced by all sorts of cool 80s references and easter eggs.
FFG, please dont lock this curiosity door.