David Gaider
If they return (and are alive to do so), it would be as an NPC-- and we've said previously that, if we include them, it would be important to do it right and not as an unsatisfying cameo that would just make the very people they're included for unhappy. If we can't do that, then we just won't have them appear. Whether they appear or not, however, the question of their disappearance will need to be addressed.
What we're doing, exactly? That's a question I can't/won't answer, along with so many other questions people will have about DA3 at this point.
Sorry, but I'm going to have to categorically disagree with you there.
The existence of unresolved plot threads is not a "cliffhanger". That is an abuse of the term (much like "cliche", "retcon" or "Mary Sure" in just about any Internet forum). A cliffhanger is when the central conflict of a story is not resolved. DAO would have been a cliffhanger if the story had ended en route to Denerim for the final battle.
You left wondering what happened to your Warden if you entered the Eluvian with Morrigan is more about closure... but that's another term that people like to invoke a bit too freely. An amiguous ending-- "walking off into the sunset"-- is often something that is done deliberately to allow the player to imagine where they went and what they did. Some people claim, however, that they will not ever get proper closure so long as there's still something they imagine their hero doing. They want to know what happened to them and Alistair, how they ruled Ferelden, where they went with Morrigan... if there's even a hint that it might have been something exciting, they consider that an unfinished story rather than a brand-new one.
But it would be a brand-new story, as the previous one was indeed resolved. The conflict ended, even if a new one began. The idea that we would have to either kill the hero or effectively kill all interest in their future in order to provide real closure is a bit ludicrous.
As for the territoriality involved in that character, as in the player feeling the character is "theirs" even if they've moved onto a new story and a new protagonist, that's probably inevitable. Short of skipping to another side of the world or another time, there's bound to be some contravention of headcanon ("I didn't imagine MY character doing THAT!"). Generally the rule is that we'll approach any use of the previous PC much more carefully than characters around the PC (like, say, Alistair or Morrigan). Inevitably it's possible we'll contravene the player's headcanon no matter what, and that's a possibility that exists the moment you stop playing the character, but we'll do our best to steer around it whenever we can.
Again, neither of these are cliffhangers. They had plots, and those plots were resolved. An unresolved plot thread is not the same as an unresolved plot, and the fact you might be interested in what comes next does not mean that what comes next is not a brand new story. I appreciate that some people want every single thing to be wrapped up neatly and completely final before they feel they can "move on", but that's neither something that stories always do nor is it something I would even consider a requirement.
Possibly.
Plot threads exist to be picked up and played with, like cats with string
Excellent. That is, however, a new story
David Gaider
Why is that a false expectation? Obviously it's a plot thread we intend to play with. It's not going to be with you playing as the Warden, however -- ultimately that character is ours now, and while we'll tread as carefully as we can, the fact remains that new plots may use them in some capacity.
Contravention of headcanon is always a possibility whenever a sequel's involved. Gosh, I can't imagine the gnashing of teeth that would have occurred if we had used the Warden as the protagonist in DA2 and had something happen to them that they didn't imagine in their head-- like Leliana being alive. Oh noes! On that point, I'm afraid we will simply have to invoke authorial prerogative. Sorry. Hope it all makes sense once you see it play out, and thus eases your concern... but I can't promise that'll be the case.
David Gaider
I've said it before and I'll say it again: if Hawke and/or the Warden appear, they will not be playable. They are now NPC's. Ideally the player will have a say in their import state (and thus their appearance), but that does not extend to control over their actions following the end of the stories they originally appeared in. That said, I doubt we would go out of our way to have them do things which would be wildly problematic... but that really depends on what one personally considers "wildly problematic", particularly if they have very specific headcanon regarding what they believe their former PC's went on to do.
I doubt it's going to be a matter of "importing" any more than you import your world state. Rather, it would be "re-creating"... and even if there is an import of some kind, most likely you'd be free to further tweak (as I can't imagine a circumstance where we could guarantee 100% visual accurancy with an import, considering the new engine).
That's still being investigated, however, so there's nothing I can confirm regarding how either of those things would be done.
I've seen some of the concerns people are posting about Warden Hawke appearance before, so I'm just going posting everything David Gaider has said about it thus far.