I'm not all up on the lore. What's Kal Sharok?
There are two dwarven cities that managed to survive so far despite the Darkspawn taking over the Deeproads. When things got hairy, Orzammar closed ranks (and doors,) and let the others fend for themselves. It was much, much later discovered that Kal-Sharok managed to survive, despite some questionable doings and Orzammars refusal to help. They each have their own king, own set of paragons, and refuse to acknowledge each other in any polite way.
Orzammar, as we know, is in-between Ferelden and Orlais, with a nice big surface door. Kal-Sharok is located somewhere in Tevinter areas with no real access to the surface. If DA4 takes place in Tevinter like so many of us are predicting, it's quite possible we'll find our way to Kal-Sharok.