In the most recent Versus trailer, when Stella turns around at that fancy art gallery party, we see her eyes are PURPLE!
This has gotta be a nod or some sort of homage to Game of Thrones. (Much like FF12 and other FF games drew a LOT of inspiration from the Star Wars series.)
The only "dragon" that we're familiar with in the FF series is the beloved Bahamut. Assuming that the Dragoon Lady IS Stella (which may or may not be true) this solidifies the fact even more.
Even in the very anime-inspired FF series, purple eyes have never been utilized. We've had pretty much every color eye (Mako, blue, green, red, yellow, etc.) except purple. The only exception to this rule is Seymour Guado (FFX) who had blue-purple eyes and his "main" Aeon was Anima.
I'd want to see Gilgamesh as someone's Eidolon in another FF game.
I think there's going to be quite a few l'Cie in this game. Aside from Noctis and his pals and Stella, there's that young robed man Noctis fought, along with the older robed man, and King Caelum, and who knows who else :p if they all have summons and they're all shown, there's going to be quite a few in this game.
"Dyin' is easy. It's the livin' that's hard..." Grim Reaper, Maximo vs. The Army of Zin