Interesting tidbit from David Gaider...
http://tmblr.co/ZIsNnt1OdPLmU
Q: Are the lands north of Thedas convenient generators of race origins, or do they already have their own lore? How much do Thedosians interact with them? Could a somniari talk to northerners? Do they trade with Par Vollen? Are any darkspawn present? Was it a cataclysm that drove races south, or pure exploration? Most importantly, are we ever likely to go there, whether in a game or a novel? Ever since reading the tidbits in WoT, I'm insanely curious about the north.
DG: The second edition of the World of Thedas lorebook should provide you some new information on what lies “Beyond Thedas”, if that’s a subject which interests you. That includes the northern islands, as well as what lies to the west and east (and even the Sunless Lands to the south of the Wilds).
Awwwwwwwww yisssss. That was a better reply than I had hoped for.
Er, "than that weirdly over-enthusiastic anon had hoped for", I mean.

(for real, though: while other people get excited about Flemeth and the Black City, the mystery that most excites me is the lands beyond, so I'm practically beside myself now)