The world of ffxii is a very special world.
It is a world haunted by the Ocurria.
We all know how powerful the Ocurria are.
They are even seen as gods.
I wanna to suggest they are powerful enough to split time.
Since it is no problem to Square to repeat the themes of their games I would go as far as to suggest that:
(take your seatbelts)
(take your seatbelts)
(take your seatbelts)
(take your seatbelts.....)
(take your seatbelts.....1)
(take your seatbelts....2)
(take your seatbelts....3)

KERWON+PURVAMA=ORDALIA+VALENDIA ON THE FUTURE.

As simple as that.

Itīs a future in a timeline where the Bahamut crashed Rabanastre.

I wanna to provide evidence but just wanna to give you time to think about this theory.