the next expansion prediction`

[Nalien]

I thought Eorzea was the entire world and Aldernard was the continent

Nope.

Eorzea is the western most continent

Nope, Eorzea is more "central" if anything. Mamool Ja came from a continent to the west (the new world), Garlemald is northeast, Thavnaria (which seems to be an island, rather than continent) off to the east, Sharlayan (another island, not to be confused with the city in Dravania) to the north, and Meracydia to the south.

Anyway, I doubt we'll be seeing Doma, considering that it was apparently razed to the ground by the empire. As for where I'd like to visit next... 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...

Beyond that though, Thavnairia has been kicking around since 2.0, being somewhat of a big part of the Relic questline. The recent Alchemist questline also involved a Thavnairian Alchemist called Waoud, who might sound familiar to anyone who play Final Fantasy XI and unlocked Blue Mage, hint-hint nudge-nudge.

I think, if I'm not mistaken, Hydaelyn is the world, Eorzea is a continent and so is Aldenard.

IIRC, Aldenard is the continent, Eorzea is the region. Vylbrand (Limsa) is a separate island to Aldenard, but Vylbrand is still part of Eorzea.

[Gunspec]

snip

Point is, they've never drawn even a halfway accurate map, to my knowledge. Sure, stuff like the Mamool Ja home you mentioned (I've never even heard of that) might be out there where Eorzean cartographers can only speculate, but we don't even have a map of the highly advanced Garlean Empire. You would think they had a map of their home continent lying around in one of the bases we've raided, but the only thing we've ever seen is obscured by clouds.

[Nalien]

Point is, they've never drawn even a halfway accurate map, to my knowledge. Sure, stuff like the Mamool Ja home you mentioned (I've never even heard of that) might be out there where Eorzean cartographers can only speculate, but we don't even have a map of the highly advanced Garlean Empire. You would think they had a map of their home continent lying around in one of the bases we've raided, but the only thing we've ever seen is obscured by clouds.

I wonder about that, would they need an "accurate" map of the entire world? A world map isn't particularly accurate anyway... Well, the map of Eorzea isn't either come to think about it... Point is, Garlemald is invading Eorzea, they'd want maps of Eorzea that are as accurate as possible, having a world map, in which Eorzea is just a small part, would not be particularly useful. Most of that map is completely meaningless to an Eorzean campaign... If you were invading France, for example, a map which also has America and Japan (basically a world map) on it is going to be utterly terrible, because the detail on France (which is what you want to focus on) would be non-existent.

As for the Mamool Ja, check out Gubal Library;