
Originally Posted by
Enkidoh
I think that scene is just to show that the player 'is just one of many chosen by Hydaelyn'
Yeah, probably 

Originally Posted by
Enkidoh
even if later events kind of throw that idea to the wind.

They're still out there. They just have zero Crystals of Light and I'm currently sitting on all of them. Suckers.
Anyway, I'm back from that break I needed to repair my absolutely blown mind.
After a little digging, I think I'm starting to believe my theory that the Starshower is the moment the border between the physical and aetherial realms broke wide open a bit more seriously. First, we have Minfilia's reference to it as dark purple and we have the fact that if you watch the portal open frame by frame, it glows purple before it opens, swirling similarly to the Ascian teleportation magick.
In all three 1.0 introductions, we see the Starshower (an enormous, swirling portal high above Silvertear Lake that spews lights similar to shooting stars), but in Gridania and Ul'dah, the "Echo within an Echo" moment preceding the Starshower happens incidentally as part of those unique stories, which explore the Circle of Knowing gathering intelligence about Imperial spies in Ul'dah and secret resistance groups in Gridania. In Limsa Lominsa, however, it's directly tied to what's happening in the events seen in the quests.
Moments before the portal is opened, The Key, a strange horn sought by the Ascians, is accidentally activated by Sthalmann. As it glows and sends aetheric ripples through the air, The Echo sounds, and in all three cities an Echo within an Echo takes place. Earlier in the quest line, Y'shtola remarks, "Of course, they will use the key to summon an army." and moments after the Starshower occurs, Travanchet, an Ascian within the Sahagin's Serpent Reavers, appears to take possession of The Key, remarking, "Power as this does not belong in the hands of your kind." It's as if he could sense The Key activating and could follow it to its source, which was exactly when the portal opened and Hydaelyn sounded the Echo. It all looks related. But then what army might have gained portage?
Oh.
So, perhaps we can infer that the seal on Mor Dhona broke and the flood of aether weakened the border between realms, spurring Ascians to begin to possess people through the tear as "shadoweaters." Via these possessions, they manipulated the beast tribes into summoning their primals by acting as Paragons and seeking out items such as The Key to advance their agenda. Sthalmann accidentally activated The Key, thinning the veil between worlds further, allowing Ascians to come pouring through, and Hydaelyn sounded The Echo, awakening the first round of Walkers... but then everything went silent. The Empire retreated to Ala Mhigo and Eorzeans had no idea who these Paragons truly were. Minfilia and the Circle of Knowing established the Path of the Twelve, and those walked it to the end dared not speak of what they saw, but eventually the Calamity drew near and Hydaelyn started recruiting hundreds for the coming war between light and dark. Sounds plausible... but that's one big house of cards.
Can we even establish that the Starshower happened at this exact point in the timeline? After the Battle of Silvertear Skies released the primals? How do we know the seal on Mor Dhona wasn't breaking in the distance and that's what set off the events that led to the Starshower? It turns out SE may have left a gigantic clue in one of the cutscenes and I didn't notice it until today.
In the LV9 cutscenes, when we first use the Echo, we see a series of events in our particular Scion's recent history. The last scene takes place right before they come to our aid in the LV5 quest (an interesting side note, this is the exact same moment we see them experiencing in the A New Beginning trailer). The scene before that takes place as the Circle of Knowing resolves to summon their master, Louisoix, realizing that his prediction that the realm would drastically change as a result of primal summoning and Dalamud's fall was right all along. The scene before that takes place before the Starshower of 1562.
In the Ul'dahn echo, we see Thancred overhear that the Amalj'aa have attacked yet another crystal caravan, and he stops to ponder on his assessment that they must be planning to summon Ifrit. Here, he is acting as an intelligence gatherer, trying to blend in with the usual city folk. At that moment in time, he's wooing two ladies at once - an elezen in a blue shirt on his right, a blonde hyur in a pink shirt on his left.
"Where in this marvel of a city might you lov-"
Hey, wait a minute...
Check out the background of the first Version 1.0 Ul'dah Echo of 1562, a few days to a fortnight before the Starshower.
BOOM.
During all three scenes where the Starshower is happening the same music track plays. This track is identified by the Before Meteor soundtrack as having the name Suspicious Corridor in Japanese, but in English it was named Neverborn. That sounds pretty Ascian, especially if you know the term from the Wheel of Time saga, where the Neverborn look like this.
What do you think? Am I getting somewhere or am I finally absolutely losing my mind having studied this same friggin' issue since 2010?