Someone from the main cast has to die in Season 3
As much as i love most of the characters, in Season 3 they gotta get a little ballsy and kill someone off already. Everyone coming out of these seasons alive is gonna get a bit boring after a while, they gotta show the audience all of these characters aren't safe.
Imo as much as i love him, Steve should be the one to die, Nancy has already moved on to Johnathan and Steve is really left with nothing connecting him to the group anymore. Unless he just wants to hang around a bunch of kids for no reason.
I think Steve has redeemed himself so much that it would be a big punch to the gut for the audience to see him die, which would be a great shocking death that packs a punch.