I'm fairly certin the main theorys of Final fantasy's universe are fairly well known by now, those being the "There's only one Gilgimesh Paradox" and "The Great Multiverse Theory".
Lets start with the 1st.
The "there's only one Gilgimesh Paradox" is the theory that, via the Great Rift, Gilgimesh (and by extention Omega and Seiryu) that apears in multiple final fantasy games are in fact only one being, in other words the one that was 1st debued in the series is the only one there is. These three beings (Along with a few others) are capable of crossing the demensional veils in the worlds via the Great Rift (Gilgimesh being sent there by Exdeath, Omega banished by it's creators, and Seiryu it's self seemingly living there).
Now, the oposing theory, "The Great Multiverse Theory":
Acording to it, all the worlds are compleatly seperate parallel dimensions with no connection and that recurring names such as Cid are simply a person in the alternate dimension with the same name and simmiler traits.
Thus how we have Cid of the Lufain (ff1) who was a Sage/Wisard/Scientist, Cid Highwind (FF7) who is an Airship Pilot, Cid Garlond (Our own FF14) who is an Inventor and Enginear, and Soon to be Cid Aulstain of FF Type-0 who is a FF verion of Adolf Hitler and Cidney from the upcoming FF15 who is the Only Female Cid thus far.
Now, as for me, I say there is no reason both theorys can not co-exist.
My theory is that the void is an outer dimension that seperates all of the worlds of FF where as The Rift is actually a dimensional path way that connects worlds to each other (Think like a bridge between the two) that can only be opened under extreemly rare conditions.
So are there any thoughts or theorys that support any of the three ideas or even thnigs that could disprove any of or all three of them?
(And Plz no flame war over this)