prequels, i would love to know how this works, where in the world of FF7 is there a great big canyon? (calmlands) so i can only guess that midgar is sposed zanarkand, but zanarkand is at the top of mt gagazet none of this looks anything like the world of FF7.
areas of FF7 look very technologically advanced, this is the only thing that give any impression that the two worlds are connected. but wait what is this spira managed to go through a huge war (machina war) and a thousand years of decline yet blitz ball survived, even when most technology has been banned they still manage to fill great big floating balls with water and play a game in them, yet they lose this ability by the time FF7 comes along or any off FF7s spin off's, not one mention of blitz ball, a game so great it has a religious like following.
then there is the cetra the ancients, i mean if you have a name like the ancient, that would suggest you have been around along time, long enough to have shown up in FF10? so where were they? maybe summoners were ancients. but if they were then why did we never hear them called cetra. or why did all characters in FF7 get to use summons and not just aerith and her mom.
and there is the guado sure they were hiding in the woods by the end of FF10-2 but what happend to guadosalam that was a very unique area, what with the place to visit the dead and all, not the sort of place you would expect to disappear and what happened to the ronso? did they morph into dogs and become red XII.
all being said i would need some real convincing that FF10 and FF7 where related