Orzammar was one of my favourite areas in DA:O, but if that has already been confirmed as not in it then could we hope for Kal-Sharok or Kal-Hirol? Kal-Sharok would be great for story reasons, there seems a lot of mystery hidden there.
Kal-Hirol would be good too, maybe we could assist the dwarves in building it up into a functioning city to gain their support?
It has already been confirmed that we won't be visiting any of the Great Thaigs, so Kal-Sharok is out. Kal-Hirol is not that likely either because we only seem to be visiting the west of Ferelden.
I also feel that the tweet about the wilderness is clear enough to know that we won't be visiting an actual city. It is rather convenient that Val Royeaux' gates seem to be closed in one of the latest books.
And as to the screenshot shown on this page, that is Halamshiral. I think there is a good chance we will only be able to visit the winter palace and the palace grounds and not much else. We have already been shown the inside of the winter palace at Halamshiral and this is where the ball takes place, not in Val Royeaux.
If DAI featured actual cities even just a section of one BioWare would have shown us by now. There is no good reason to keep something like that a secret until release.
It is not that I don't want to see an actual city, I absolutely do but there has been no signs of us actually being able to visit a city and there have been many signs we won't get to visit one.