Okay...good thoughts. But here take this in for thought...

The minstrel giving us the Goobbue said some fascinating things. "A single-horned beast leading a flock of chocobos from a burning forest." The Satrap nation's secret...and now in our hands..."With this horn, may you lead us from despair, and help usher in a new age. "

The single-horn of that beast...which is the horn we now possess...a power to lead out of this coming storm.

The bards will sing continuously till the new era ushers in. Mayhaps this horn do more then summon a Goobbue...PRAY IT SUMMONS A CELESTIAL MY LIL PONYCORN!!!!

There are also considerations to the subtle warriors of light references...for all we know the echo could be the power to travel back in time...another dimension...far into the future.

We still have yet to get the story on the 12 guardians...which SE mentioned that they were working to tie into the coming events.

Yoshida said things...formations...will be appearing in the game and to look forward to them.

The appearance of the beast tribes...the alarm amongst mortal men...we see our spies staking out beast tribes in wait for war. To the west the Ishgard soldiers are protecting us from dragons. To the east the encroaching empire. In the shroud the wood wailer's prepare to make their attack. In Ul'dah those with the echo including our path companions may well risk their lives with their special powers. And we still have the elementals stirring uneasily.

The concept art shows us Odin...Odin brings about the norse mythology of the Yggdrasil...the deaspected crystals...perhaps once full of energy being absorbed by the planet springs forth the Yggdrasil...which ushers in Odin.

The whole a meteor hits and we live on into the next generation doesn't fit. Since ruins just don't pop out of Gridania and the world doesn't altar the way the conceptual art does unless we either go back in time or a dimensional collision of some sort.