From what I know: Unfinished Business is focusing entirely away from Corone and Alerar, where a lot of the attention of threads seems to be at the moment. It's focused over in the wasted of Raeria (I can NEVER spell that right) and is about the group trying to figure out a way for people to survive the apocalypse that is upon them. It's a bit gruesome, in that the survival might not necessarily mean they're the same people they were before, but they would survive and be able to rebuild.
Nevin is definitely going to want to take part in things going down in Radasanth - it is his home after all - but helping Eteri out is going to take priority. So looks like he'll join that one.
