On Storm Tracking subchapter in Episode 4 - A star to guide us we had:
: Rytlock, I need you to enter the Mists and gather as much infromations as possible. Find out how to reverse the damage.
Rytlock Brimstone: On it.
then we had episode 5 and 6 without a single word of Rytlock about this "mission", or even if he tried do it. its seems a abandoned story line
"It's a testament to the folly of the humans and their gods. They say Arah was sacred, but all I see is one big dragon nest."(Rytlock Brimstone)