Would require a new time-altering method, as the people who've progressed enough through CoP have already witnessed its destruction.
However, there's still tons of lore that I'd like to explore. My personal favorite would be the west continent, because it sounds like more than just wilderness. Most people would vote for Mithran homeland, I believe, but I've had some taste with Windurst and Kazham and am personally not a big fan of the vibe it gives off. But still, I'd take what I could get, gladly, if they make another expansion in any direction.