So will we be getting Varric back? Plus good news about dorian.

The most obvious one is the Inquisitor. That would remove a big headache for them. However, if they are killed I doubt it will be by Solas' hand. He has had plenty of opportunities for killing them, including in their sleep, so it would have to be someone else. A rogue agent perhaps?

That whole drinking from the Well of Sorrows thing is a loose end that needs tying up. Remember the Inquisitor could drink instead of Morrigan. That had the benefit of being able to talk proper elven and give the appropriate password to the spirits serving Solas in Trespasser but there has to be more to the problem of who should have drunk than that. We know Mythal can control the drinker. If Solas absorbed Mythal, then presumably he can now do that too. Or was one of Flemeth's final acts to release them from the Geas? Solas clearly had concerns about the knowledge of the Well; which I assume is why he asks you what you will do with it, although that always seemed rather odd if Morrigan was the one who drank because surely he should be asking her? Anyway, it is possible he wouldn't want to kill the Well Drinker for fear of what it would unleash.

It is difficult to know who else they could kill off who isn't already potentially dead and has a reason for being up north. I don't think they would dare kill off Dorian. Isabella? Ditto. Merrill? I suppose she could have joined Solas, so we are forced to kill her. Hardly anyone else I can think of meets my qualifying criteria, except more minor characters like Harding or Charter and they are more likely to be bridging characters rather than cannon fodder.

The same would be true for most companions, I guess. I might not be heartbroken personally by say Merrills death, but a lot of people would be. I agree, that a possible character death should have impact and really hurt.
Dorian in so far would make sense, as he probably will be in the game. But Merrill, as gervaise said, could be a follower of Solas now or otherwise connected. Fenris would be a good candidate too. I think, he is around Tevinter, hunting magisters atm? I haven't read the comics yet, so correct me, if I'm wrong.
I would be ok with killing off Varric too. It seems, that he will be somehow part of the story, so the possibility is there. It would certainly have an impact on me.

Very much this. Having just finished a complete DA2 run, Merrill is not down with the wolf.

And we all know that in BioWare games, existing characters will return juuust the way we remember them...

Which is why I prefer to keep them to an absolute minimum.

I think Dorian might he have been the most universally liked character in DAI and is definitly alive for the next one, that would be quite the punch. Sera was loathed by a lot of people. Cole... can he even die? Vivienne and Cassandra are probably out due to being Divine. Blackwall, Bull are quantum characters. Technically, that also leaves Varric, though judging from the reactions to his return, plenty of people would like to see him go for good XD

Maybe one of the advisors? Josephine would be alive in every timeline, not sure how popular she is.

Dunno how much impact death of the older companions would have. But then again, DAI is pretty old by game standards too.

I’m fully expecting character assassinations.

Not all Dalish are supporting Solas. If anything they should be the elven group that trusts him the least due to, you know, him being a trickster god and all.

That’d certainly be a way to make DA4 even worse than it already will be. But I doubt she’ll be involved at all, considering she can be dead. Unless they do like they did in ME3 where either she shows up if alive or another character does to fill that role if not.

In DA2 if you side with the Templars and don’t have high enough support with her she’ll side with the mages and oppose you.

Oh I’m sure some clans have joined him, especially if he keeps who he is secret from them. We also know the clans can be wildly different from each other, so some might not care. But as I said before, unlike all of them Merrill knows the truth about Solas and his plans. Not to mention she wouldn’t want all her non-elven friends (and possibly lover) to die, similar to characters like Charter.

Yes, if you side with the templars and not have high enough influence with her (same as with Fenris, if you side with the mages with not enough influence)

I am not being rude or trying to be mean but if you are sure that DA4 is gonna suck then why waste time coming here? It just seems like a waste of time and energy.

I suppose technically it is Hissrad who is dead. The Iron Bull died with his Chargers no matter what he still continued to call himself. When the Viddasala called him to action, she used his Qunari name. The Iron Bull is the one who refused her.