This may sound Dumb but what if Holly (Mikes little sister) is gonna be part of the mind flyer in season 4...
Or
Remember what happened to Hoppers daughter,sara? She saw something then got cancer and died...what of that happens To holly cause of the Moving trees she saw in season 3.
Wait hold up
(I'm watching stranger things right now)
It was the mind flyer moving the trees...but i still thought thought they where good theories 🤷🏻
