Necron is a Deus ex Machina final boss, as homage to the other final bosses in past FFs. (Cloud of Darkness, Zeromus, Neo X-Death, etc.) I honestly didn't find it surprising, given that the game is a tribute. And why the hell would anyone complain about that?
Anyway, that theory up there (somewhere) is just a theory. Though I do wonder how much time it took the person to think of all that.
