Throwing in my two cents:
At first, I thought the "two lands [that] meet" were simply Fjorden and Arelon, because I was dead-set on the Elantrians being the "gods [that] have died." After seeing the concept art for WoK, I'm not so sure. Roshar and Shadesmar and undeniably two lands that meet, and we know for a fact that the Shards can die. Perhaps, then, one or more perishes in the plot of HoK, or at least Stormlight Archive in general?
Gah. Discussion about the Shard Cosmology always gets me excited.
EDIT:
planar theory
WHOA.
WHOA.
WHOA.
Prediction time. There are multiple Shards of Adonalsium, something originally much greater and unified, yes? And under planar theory, there are multiple planes of existence?
Each Shardworld could possibly be an extraplanar version of the same planet. If Adonalsium was connected to a single world as the Shards are now, then it's conceivable that the world would shatter in a similar manner - many copies of itself with similar properties, but none of them a perfect recreation.
This also makes Hoid's planet-hopping antics a bit more easily imaginable. Rather than actually flying through time and space to different planets, he's simply shifting which plane he's in.