FFXIV x Zodiac Age

[Belhi]

Ivalice and Hydaelyn are currently two completely separate worlds. The raid in Stormblood could change this (and would be a pretty big deal), but until it does XIV has set a precedent for using things from previous FF titles but those things being their own thing in the XIV world and not the actual original. Currently there is no compelling reason (especially given previous interviews on the connected or not nature of the world) to think this will change.

The major nations from FF12 already have their namesakes in FF14 in Garlean territory. Ivalice will quite likely just be a region in the Garlemald empire that acted as an alliance against the Garlean invasion. The two worlds really aren't that compatable. The geography, metaphysics and even noteworthy figures don't really match up.

I'm not sure Zodiark can take up the slot as the massive overarching evil for Eorzea, given his will is the rejoining of the shards to gain freedom. By comparison the Void's denizens want to turn every reflection into a Void as well, destroying everything in the process. Zodiark is the prime opposition to Hydaelyn, but we don't have any guarantees that Hydaelyn is some kind of benevolent entity, or that Zodiark delights in our suffering.

Considering the general contempt his followers have for mortals and the fact that every rejoining kills massive numbers on the source world and everything on the shard world its hardly friendly. Admittedly we really only have one side of the story at this point. 'Evil' or no, Zodiark's goals are most definitely not benevolent towards mortals, if only by the fact that they are collateral damage.