Play the older classics (FF1 - FF2)

You will notice that Vivi is a black mage, which were in them classic games. The worlds are not linked, seeing as the continents are shaped and spread differently, Square had only put these references in the games to remind the hardcore fans of the other games. I am being serious here, it's fact not scepticism.

FF9 was the odd one of the newer FF games, seeing as it had alot of references to the older FF games, "Going back to the roots" as people have refered it.

On FF2 (or 1? correct me if I'm wrong), the world is called Gaia, which so happens that it's also called that on FF9, meaning it's going back to that reference thing. All the other FF's (correct me if I'm wrong again) do not tell you whether there is a name for their world, except that of FF10 (which is Spira).

All in all, I just believe that Square were not intending to connect the worlds as such, but only the games in a sense. This sense being refered to the older games of the series, just to give the hardcore fans some spice.

If a FF game were to be linked with another, it would have to be FF2 and FF9, seeing as the worlds are the same name, and there are a lot more references between the two then the other ff's... (job system, world name, etc.) (sorry i know theres more but i cant think properly at the moment).

Anyways, that's just my opinion, so don't go off at me for it. I do believe this should be in the General FF Forum, seeing as it isn't JUST refering to FF8?