I am working on some more "highway" type content for the game, which can expand it out more then the what road from rocksport to turien.

I'd like to see a few more zones similar to guard isle, and or another continent.

Here are a few ideas:

A few more new ships, schooners, wagons, caravan, or similar traveling options.
City of the sands, has an entrance but really where does it go from just an exit?
More water zones, make a use for water breath.
Air zones, lets get people flying and exploring, flying mount encounters, heck even more flying mounts that can support giants.
An island city which is more of a mass market city where multiple ships can travel to and from.
Pirate city.

Thats just a start, plus list ideas for those that are building or are not might inspire someone else for something they want to see.
Sol.