Also, in FFXII the Serpent constellation represents Zodiark which (if I'm not mistaken) is woshipped by the Ascians as opposite to Hydaelyn. We know that Urianger is somehow linked to the Ascians too so I wouldn't be surprised if we were in for something big .. as of now there are so many plot lines still open:


The Warriors of Darkness
The Warring Triads
Ida and Papalino being probably in Ala Mhigo
Minfilia's destiny (did we finally get rid of her for good?)


They might all be connected ...