Quote Originally Posted by TheAbominatrix
Quote Originally Posted by TurkSlayer
I think the only two that could even possibly be connected are II and IV because A) There is a child named Kain who says he will grow up to be a dragoon, and B) They both have a place call Mysidia. Thats not very much evidence, either. But between other FFs, there is no connection.

EDIT: Besides, FFIX didn't have too much machina. Sure, there was a bit, but not on the same scale as Zanarkand. And if Sin had already come, I believe it would have been mentioned in IX.
While Mysida may work, Kain would not. Notice the amount of geographical differences. Also notice that there is no Baron, while we know Kain Highwind was raised by the King of Baron, right alongside Cecil. There are no crystals in II's world, and the geography and towns could not change so drasticly in 20 or so years. Kain is just a backwards reference, just like the reference of IX (only, of course, backwards).
Like I said, there isn't much evidence to prove my theory, and there is much more evidence against it. As I said, it was only a possiblity, and it probably isn't true, as you have pointed out.