Ricky was subjected to a number of tests – similar to that of Eleven (Millie Bobby Brown) – at the Hawkins lab.
Hints were made about whether Ricky had any supernatural powers – similar to that of Eleven – but nothing was ever confirmed.
With such a huge set up for a brand new character, could this be a massive hint towards a return for Dr. Brenner alongside his son?
Season four certainly needs an antagonist, as Eleven and her friends killed off the Mind Flayer in the finale of season four.
source: express.co.uk