Since this has been heavily FF4 themed, the patch trailer seems to confirm that Zero is going to have a Cecil moment (her glowing with light). Won't be shocked if she transitions from reaper to paladin, like Cecil transitioned from Dark Knight to Paladin in FF4. In the flashbacks, it seemed like she was originally a Paladin anyways before the 13th fully fell to darkness. Although if we are wrapping up the Golbez storyline this patch, then 6.55 presumably will be mostly focused on the intro to the next expansion.
Also for the raid series, it seems to hint what many people suspected for months now: At the end of the raid series, the "gods" are all going to return to the star and effectively die. Since they're basically the souls of Ancients, Ancients by culture as a rule consider it the proper course of action to essentially die and return to the star once they have completed their goals/tasks. We already know the identity of some of them if you paid attention during side quests in Elpis.
On a side note, that Asura raid fight looked awesome - her after image kind of looking like a painting, then it keeps growing and turns into a giant version of her