First expansion is probably related to the east continents, where Doma is. 2.2 patch is about them coming to seek refuge. But in the expansion it could be a treck to the new lands.
This would suggest new jobs like ninja, samurai, and even blue mage - "eastern" jobs.
The clothing has a little resemblance to ninjas/assassins in FFT, or blue mages in FFXI.
Also, Doma is Cyan's fallen kingdom in FFVI, and Cyan is a samurai.