Finish up Eorzea before moving out, I say... Lets see Paglth'an, Xelphatol, and the northern half of Vylbrand (so Mount O'ghomoro), lets see the Far Reach and Yafaem Saltmoor. Finish the current map before giving us a whole new one...
You didn't mention Ala Mihgo, which I'm betting is where some of the action will be. It's on the continent, right by Mor Dhona.