I have a feeling that a lot of the recent "is Jonathan gonna be the one to die?" speculation is more to do with the Team Steve / Team Jonathan conflict in the fandom than anything based on actual hints. I mean, there are seriously people on tumblr who believe that Steve is entitled to Nancy if Jonathan's out of the picture.
As if Nancy's a table tennis ball who gets bounced back and forth between two guys... That's what some of the fandom have reduced her to, apparently.