Patch 6.5/6.55 speculation based on the art work.

[Cleretic]

The 6.55 site has gotten more than just the artwork and the interesting thing that has been added is the picture of a party fighting the Dark Elf.

For what it's worth, the Dark Elf doesn't have a reskin in the Lunar Subterrane in FFIV, so we're not looking at them just recreating the enemy encounters like they did in, say, Syrcus Tower.

Cracking out the list of FFIV bosses, here are the ones that we haven't somehow seen in XIV, in alphabetical order. Also excepting the several generic dragons, because it'd take a good couple hours to dissect which ones might've been inspirations for random Heavensward enemies or something.

• Asura (but she's probably not gonna be a dungeon boss)
• Baigan
• The CPU of the Giant of Babil, technically; the spherical Allagan nodes are based on it, but we've never fought one based on its gameplay.
• Dark Bahamut
• The four Elemental Archfiends all at once
• The King and Queen of Eblan
• Lunasaur (actually from the Subterrane)
• Ogopogo (also Lunar Subterrane; it was a Leviathan recolor)
• Plague Horror (Lunar Subterrane boss; recolored Ahriman)

If you want to count enemies from the GBA or 3D versions of the game, then we can also count:

• Death Machine (recolor of a Lunar Subterrane enemy they've never used)
• Flan Master
• Geryon
• Gigas Worm
• Proto-Babil
• Zeromus EG, the Zeromus design from the 'easy mode' American version of IV
• Most Lunar primals

It's fair enough to think that the re-release bosses shouldn't factor in, but I think they should be considered since they're actually where the Lunar primals came from! Well, they were Lunar Eidolons, but you get the idea.

So we do incidentally have exactly three bosses from the Lunar Subterrane we've never seen. I don't think they'll all be used, though; Lunasaur's got a unique take on a bone dragon design we've never seen, but the others don't. My guess is actually that the three bosses will be the Dark Elf, Baigan, and either one or both of a pair of fairly striking non-boss enemies from the final floor of the Lunar Subterrane: Zemus' Breath (or just Breath) and Zemus' Malice/Zemus' Mind (or just Mind). That said, Zeromus EG feels like exactly the kind of pull I'd expect the developers to sneak in somewhere.


Also worth adding: the update also added a picture of the Heaven of Water for, most likely, Thaliak's boss fight! Its architecture I'd say is a combination of Nym and Sharlayan elements, which makes complete sense, and there's also a statue of a tonberry, which is either a really cute touch, or showing that the gods have an awful sense of humor.

...although Nym's patron deity was actually Oschon... hmm.