» Sat May 28, 2011 1:13 pm
Right now, the answer to both questions is "We don't know", we don't even know if any cities will be destroyed during the course of the game, though it would seem likely that sometimes will get destroyed at some point, whether it's like Kvatch where it's destroyed the moment you go there or if you actually get to see how it was before its destruction. I just can't imagine a story about dragons coming to destroy everything without getting to see what they do to cities they get their claws on at some point. But since it hasn't been confirmed that any cities will be destroyed, we obviously can't know if any destroyed cities will be rebuilt.
As to whether dragons cotinue appearing after the main quest, we don't know, and I'd say it probably depends on how the main quest ends, and obviously Bethesda isn't going to tell us that before the game's release. But if I were to hazard a guess, I'd say "no", keep in mind that's only a guess on my part, and I've been wrong about this sort of thing before, but my guess is that the ending of the main quest will put an end to the dragon threat.