Personally, I think they're gonna pull and XI-Wing-of-the-Goddess mixed with some III and...
...have it where there are two worlds/time-lines that are fighting to defend there existence, each with their own crystal and Ascian organization infiltrating the other world. The Ascian the Warriors of Darkness were fighting was on our side , while the Ascians we fight are on theirs. I theorize that our Ascians maybe named/are the Twelve +1 more (like Eldibus), like how the Ascians we face are named after XII's Scions of Light.