POSSIBLE PRIMAL

[Ultimatecalibur]

Also, at some point they're just going to straight up run out of primals/summons from FF lore and need to start creating entire expansions with only new ones.

Still have a bunch that they can steal from 6, 7, and 8.

Maduin
Fenrir (they actually did a retcon to open things up so they could have a full Fenrir summon)
Valigarmanda
Quetzalli
Raiden
Hades
Pandemona
Doomtrain
Eden
Griever

This doesn't even account for other non-summons they could turn into Eikons.

They kind of already have. IIRC Ravana and Lakshimi are new.

Ravana was new. Lakshimi originally appeared in FF6.

[RichardButte]

Still have a bunch that they can steal from 6, 7, and 8.

Maduin
Fenrir (they actually did a retcon to open things up so they could have a full Fenrir summon)
Valigarmanda
Quetzalli
Raiden
Hades
Pandemona
Doomtrain
Eden
Griever

This doesn't even account for other non-summons they could turn into Eikons..

Oh, we're not there YET, for sure.

Eventually, we'll be looking at all new primals made for XIV.

Though, by the time that happens, the nature of what a "primal" even is may have shifted so much that it's not going to be what it used to be any longer.