Viera are by far one of my most favorite races across the FF universe next to perhaps the miqo'te and the Ancients/Allagans/Elder races usually only seen in the backstory lore of games. I'd love to see them incorporated, however I'm not sure how they would fit in the coming scope of what is being laid out for the expansion.
Given how much SE gave us overall with HW and how they made mention before that they likely wouldn't be doing an expansion of such magnitude this time around, I'm guessing that we'll mostly just have the new content, new areas, MAYBE some new classes...but likely not races.
Leaning towards the thought they might do something similar to WoW: one expac gives us new races, classes, areas, all that biz! Then they do trade offs: one expac has new areas and classes but no new races, one expac gives more area and a new race but no new classes, etc etc etc.
Or they could say #yolo and give us something new in a patch like they did with NIN.
Given how much SE gave us overall with HW and how they made mention before that they likely wouldn't be doing an expansion of such magnitude this time around, I'm guessing that we'll mostly just have the new content, new areas, MAYBE some new classes...but likely not races.
Leaning towards the thought they might do something similar to WoW: one expac gives us new races, classes, areas, all that biz! Then they do trade offs: one expac has new areas and classes but no new races, one expac gives more area and a new race but no new classes, etc etc etc.
Or they could say #yolo and give us something new in a patch like they did with NIN.