The game will get a Vita port
Luxendarc is a future version of the Final Fantasy 1 worldCompare the map of Luxendarc to the map of Final Fantasy 1 on its side, and you notice several similarities. Perhaps Luxendarc is set in the future of Final Fantasy. Due to continental divide and shift, Cornelia/Provoka could easily have become the Caldisla region, Lufenia exists as Ancheim, Onrac as Florem, and the Crescent Lake area as Eisenberg. Likewise the Carida Islands could have become the Crescent Islands over time.
Square Enix knows about the Demo Villager bug.They might have even intentionally created it. Not everyone is in the position for the Socialization Bonus. Carrying over 20 villagers from the demo is enough to unlock the village early for people patient enough. It sweetens the deal that people who use the villager bug may be thinking they're getting it "illicitly."
New Norende isn't fully on the physical plane.You start rebuilding it before you even plug up the giant hole crater that sucked in Old Norende. Not to mention, you only see it in your menu; it's not on the world map. It's even there if you choose at the same level of completion in New Game+. It's like Traverse Town. Especially since people from Alternate Universe (ie, the Internet, or Streetpass) can join and help rebuild; it's actually a spiritual dimension closer to the world of the gods. Our World.
There are multiple Airy's. The Big Bad created multiple versions of Airy to send throughout the multiple Luxendarc rather than there just being a single one. Similar to the Maenads from FF 4 Ta Y the Airy's are clones sent to awaken the multiple crystals, and 'Airy"s sister' was just one of the many Airy's, only this one went renegade.
Specifically awakening the crystals is what screwed the world overAs in, going the whole five yards or whatever. Simply breaking off the darkness on the crystal would be enough to restore its power.