Yeah I think Solas as he is right now, truly believes he needs to do what he needs to do for the greater good. I want to almost compare him to Leliana (not sure if this is an entirely appropriate comparison), back in Haven, where we have the option to stop her from killing the agent. During the game she's clearly someone I would consider some kind of an antagonistic figure. She's obviously cool in our book because she's on our side, imagine if she wasn't? In her mind, after all she went through, she believes the end justifies the means, so even though she doesn't like doing certain things she feel she needs to become this cold killer to get what the Inquisition needs (Even worst as hardened Leliana).
[snip]
Solas what is it, tell meeeeeeee......And if it's any or none of those things, what is he willing to sacrifice to succeed?
That's a pretty good comparison. I don't think they're that different, when you put it like that.
As for what he plans? I don't know. All we really have to go off of is Cole's reading of Solas' mind.
Cole: You don't need to envy me, Solas. You can find happiness in your own way.
Solas: I apologize for disturbing you, Cole. I am not a spirit, and sometimes it is hard to remember such simple truths.
Cole: They are not gone so long as you remember them.
Solas: I know.
Cole: But you could let them go.
Solas: I know that as well.
Cole: You didn't do it to be right. You did it to save them.
Inquisitor: Solas, what is Cole talking about?
Solas: A mistake. One of many made by a much younger elf who was certain he knew everything.
Cole: You weren't wrong, though.
Solas: Thank you, Cole.
Cole: He hurts, an old pain from before, when everything sang the same. You're real, and it means everyone could be real. It changes everything, but it can't. They sleep, masked in a mirror, hiding, hurting, and to wake them... (gasps)Where did it go?
Solas: I apologize, Cole. That is not a pain you can heal.
Based on that, until given contrary evidence, I'm just going to assume he wants to wake the elvhen pantheon, or the whole sunken Arlathan, or whatever he might have sealed away in the past that led to the current present for elves everywhere. Since he describes the Orb as something that greatly enhances magical ability, he probably needed its power to reverse what he did in the past. It's kind of like in the game when you first try to seal the Breach. Corypheus pour a great deal of preparation and power into creating it (only for Justinia to slap it away into the Inquisitor's hands at the last second), and Solas figures that closing the Breach would require the same amount of magical power used to create it. Likewise, whatever magical power Fen'Harel had in the past that had allowed him to seal those "masked in a mirror" has now dwindled from a thousand years of slumber, and he needs that same amount of magical power to open whatever he sealed. He was going to use the Orb, but Corypheus took it and ran off. He tagged along for the game partly to help repair the damage he caused, and partly hoping to get it back after Corypheus was defeated. Then it broke. Who else has that amount of ancient elvhen magic lying arou - *gasp* Flemeth! "Oh, Mythal~!"
I personally don't know what to think, so I'll stick to this theory until more information becomes available.
Yeah I wish we could've had a discussion about the Dalish but more specifically our Clan. Not enough bonding time what the hell~ Solas let me tell you about MY PEOPLE, k?
I know, right?? I guess all we have is headcanon. *sigh*
I do imagine that during one of their many long discussions, Solas made a rather dismissive comment about Lavellan's devotion to the Dalish, and she said gently, "Of course. They're my Fade spirits, Solas." Considering how much we know Fade spirits mean to Solas, even when they are twisted and corrupted into demons, I think Lavellan explaining her love for her people by pointing out his love of Fade spirits would have it sink in for him.