Am I the only one who thinks Solas is choosing this journey alone because he is attempting to punish himself for his own crimes? He may fear dying alone, but he seems to be forcing himself to pursue this pain by choice.
Shared. I also feel a lot of self-loathing coming from Solas, way beyond his regrets, to the point that it seems he's punishing himself constantly. Even if he "fixed" everything the way he intends, I don't think that behavior would stop there. (There's a point in which I can even find some parallels with Anders in DA2.)
I think the Trespasser ending provided a hint that the Solas we'll meet in the future release definitely won't be the same Solas we met in DA:I.
Regardless of the Inquisitor's relationship with him, he always emphasizes his voluntary final detachment with anyone that belongs to the current DA world, mostly to make it easy for him to burn everything to the ground and not feel so bad about it. He dehumanizes himself for others, and dehumanizes others for himself, so none of the parts will think of the other as anything but monsters (he'd be tricking himself and others with simple extremes, while reality is much more complex and grey than that, and he knows it.)
I hope they make a memorable anti-villain out of him, to the point of making him the antithesis of villains like Corypheus, that want endless power and godhood just because it seems cool to rule and enslave everyone, because evil logic.
Instead, Solas seems far more realistic than the average "villain". I think DA:I was our chance to meet a warmer Solas, while we'll possibly have a radically different view in the next game. (I can't wait!)