Psssht, everyone knows that Zanarkand used to be called Midgar and that Tidus is the reincarnation of Cloud created by Aerith because Sin was actually created by Sephiroth.
Also, didn't you know that FF2 was actually the War of the Magi referred to by FF3?! They're direct sequels!
Please tell me you know I'm joking.
Edit: Had something completely made up, now hidden but preserved for laughing's sake.
That's even better. A character named Shinra from FFX-2 implies that their descendants founded Shinra corp.
Can you present something *canonical* to support that the boy named Shinra was anything more than a reference to FF7?
More seriously, I suspect that if there's space involved in ARR, it'll be because the players' parties get teleported into space from the crystal tower, or Bahamut's labyrinth. I mean, seriously, why would Bahamut waste his time coming down to Eorzea just to beat up some reckless adventurers?