Steve Harrington is the MVP of Stranger Things 2. The former pretty-boy bully matured through the show's second season in a way that resonated with viewers, and more than a few noticed some parallels with another fan favorite, Chief Hopper.
Part of Steve's arc in Season 2 revolves around his being slightly adrift towards the end of his senior year of high school. He's not sure he can get into college, he loses his primary motivation for staying in Hawkins (his relationship with Nancy), and he grimaces at the thought of working for his father. But over the course of the season, Steve seems to find his calling as a protector of the kids as they fight the Mind Flayer. A few perceptive fans see this leading to Steve signing up for the Hawkins Police Department and training under Chief Hopper. The department seems pretty understaffed as it is (we only see what, three cops around town this season?) and Steve being paired with Hopper would be very beneficial to the characters' growth.
That said, it seems at the end of Season 2 that Steve's priority is making sure Nancy is happy, and if he's wrapped up with police training, he might not have time for that. We may never get to see Officer Steve, but it certainly isn't outside of the realm of possibility for the character.