The Steve & Robin Spinoff
One of the most obvious Stranger Things spinoffs that many viewers would love to see revolves around Steve 'The Hair' Harrington and Robin Buckley. Season 3 introduced the world to this duo, and they quickly became one of the best friendships on the Netflix television show. Although some viewers thought they were being set up to be romantic interests, Robin later came out to Steve, quickly shutting down any possibility of them ever being more than friends, and that was evidently for the better.
Maya Hawke and Joe Keery as Robin and Steve in Stranger Things season 4
Steve and Robin perfectly complement one another since they are polar opposites but understand one another on a level that most people don't. If they both survive season 5 (fingers crossed), it would be in Netflix's best interest to order a spinoff centered around Steve and Robin, preferably as roommates in a new city. The Steve and Robin spinoff wouldn't even have to include any supernatural elements. It could just be about them being single, living in a big city, and trying to navigate adulthood, and people would be ecstatic to watch it.
Maya Hawke as Robin Buckley and Joe Keery as Steve Harrington in Stranger Things
Kali's Adventures
Although Stranger Things season 2, episode 8, is arguably one of the show's worst episodes, it does have the possibility of setting up an intriguing spinoff. The hour focused on Eleven meeting Kali Prasad, aka Eight, one of the other Hawkins Lab test subjects. Although Eleven and Kali had similar experiences growing up and could bond over their powers, they couldn't have been more different. So, it would be interesting to learn more about Kali's ideals and adventures after Eleven left Kali in Chicago in season 2.
Noah Schnapp as Will, Finn Wolfhard as Mike, Millie Bobby Brown as Eleven, Sadie Sink as Max, and Caleb McLaughlin as Lucas in Stranger Things
The Stranger Things Kids All Grown Up
Most of the Stranger Things kids are not kids anymore — the actors who play them are either in their late teens or early twenties. It's unclear whether season 5 will have a time jump to account for their rapid aging, but given the cliffhanger in the season 4 finale, it's unlikely. Eleven, Mike, Dustin, Lucas, Will, and Max still be in their early years of high school, and that will probably be where the show ends. However, it would be plausible for a spinoff to focus on the Stranger Things kids as young adults, given their ages in real life.