What Happened?
Darnus uses the ancient spell "Meteor" to bring down Dalamud, but no one can imagine that Dalamud was the prison of the king of the dragon, Bahamut.
Like Garuda said during the quest In for garuda wakening, Primals absorbs aether and crystal power...
So when we defeated Garuda, Ifrit and even Darnus, Dalamud was enough close to us for absorb their powers... This made Bahamut more strong...
And when the first key of god falls from Dalamud... the power of Twelve no more sufficient for keep bahamut in the prison..
And how we can see in last Cutscene, we can see Bahamut Power destroy the prison and get free finally, after years of prisoning.

So the Archons, Thancred and the others, tried to imprison again Bahamut praying for the Twelve.. And Louisoix cast the Imprisoning spell... But the power of bahamut is too powerful now..

Bahamut casts Giga-Flare... But Louisoix with last power of Althyk (God of Time and Space) teleport (all?) us 5 years in the future..



Now i've some doubt....


1. If We raise the power of Bahamut killing Primals and Darnus, why Louisoix asked to kill them?
2. Why Thancred and the others, even Louisoix, didn't tell us that Dalamud was only a prison for Bahamut?
3. Why Bahamut is different from other Primals? Why He try to destroy all?
4. How could Louisoix use the power (signet) of Althyk? He wasn't the Archon of Thaliak?