I totally respect everybody's takes on this, but I'd like to share my opinion:
It's possible that I'm extremely biased towards Adolin because he's my second favorite Cosmere character, but I honestly, genuinely, don't see him dying. It just doesn't make sense. His arc so far has been about figuring out how to live in his current situation, and support his family. Dying wouldn't complement that arc, in fact it would completely negate it. Not to mention if Adolin were to die, both Kaladin and Shallan would fall apart (maybe even Dalinar). Specifically Shallan. Killing Adolin off would probably mess up four books worth of character development so far for several characters, and would go against some of the books main messages.
SA is about rising above the past and moving forward, making the future better for those who will come after you. It's about change as a society and the slow path to becoming a better people. If Adolin, a young highprince with the power and will to change things dies, Brandon can't use him to convey that central theme. Adolin is meant to be different from his father in that he learns from his fathers mistakes and tries to do better, so that his children can do even better. Killing him would make it hard to convey that idea, and that theme. He can't live on to be a better highprince then his father before if he's dead .
Not to mention, with Kaladin, Adolin is a character that emphasizes different people from different backgrounds learning to work together. While not the only one, Adolin is one of the noble/lighteyes that Kaladin actually trusts, and learning to trust each other adds to that central theme. If Adolin were to just die, a lot of that faith in each other that could have otherwise been built up on would no longer have impact in the story.
I couldn't disagree more, as stated above, killing Adolin would hurt character development for his friends, not help it. Kaladin and Shallan are both on thin ice when it comes to mental health, maybe being able to move past a death is something Kaladin needs to do eventually, but not right now. Right now, that kind of death would ruin him. He was able to move on from being suicidal in RoW, but that doesn't mean he's emotionally ready to watch one of his friends die, same with Shallan. If Wind and truth is going to cover the ten days to the final duel, and perhaps the aftermath, there is not enough time (imo) for Kaladin and Shallan to become stable enough to except a death that close to them.
(EDIT: I also just realized killing Adolin might also mess up any healing Maya has had thus far as well, ruining the point of his bond with her in the first place)
Sorry for the rant, I just think he's one of the least likely to die. (or maybe I just really, really don't want him to lol)
Characters I could see dying:
-DALINAR (my dudes he's gonna go, I really think he is)
-Szeth
-Jasnah
-Shallan (a little less likely but still an option)
-Moash (I'm imagining a Darth vader 'redeemed through death' situation)
-Literally any of the Bridge four side characters whose names I don't remember--these would actually be handy to kill off, because the reader knows them and their history enough to care, but taking them out of the story doesn't really hurt anything.
That's what I was thinking