I really don't think either Aura will be back or Aina will become the new Ultimate AI. Aina said it herself, that she would also return to the "wind"...
Zefie said that. We've never even heard Aina speak.
I really want to think that there will be a different conclusion than to simply look for substitutes, i mean, even if Aina becomes a godess, she will be linked to the main problem that being "goddess" represents (or great powers), the law of "cause and effect" (Anti-Existence)... I think G.U. is a bit more than Aina, and just that... and the key to find that, may be Ovan or Haseo (the last one, i really don't think so, but probably)
And maybe AuraTwilight's theory is correct, and that would explain why Aina seems uncomplete, but not so uncomplete, because there was a Dummy Program created by Amagi to replace the 7th Phase, Tarvos that was taken away by Banshoya Jun.
That's actually a really good point. I'd be satisfied if Aina is given an oppurtunity to become the Goddess, and she turns her back and is like "No, because then the cycle will just keep repeating."
Or maybe it's in Haseo's hands to give Aina her Goddess status and he's like "Mankind doesn't need a god."
Do you mean something like, instead we end up with another Ultimate AI that will follow Aura's step, we have an ending where there is no Ultimate AI, but everything's fixed and even better then back with Aura??
The Republic of Heaven. Instead of serving a God, mankind will fend for itself and build it's own future, without relying on a higher power.
If that happens there wouldn´t be any meaning to Ovan´s effort in teaching her for such a long time, if she would do nothing in the end, and as TheSorrow wrote the problem would be solved, but the next ones wouldn´t and as far as I´m corcened (almost)everything in .Hack is about the Ultimate A.I.
Of course there'd be meaning. Just because she doesn't become the Ultimate AI doesn't mean she shouldn't learn anything. Assuming Aina doesn't become the Ultimate AI, she'll probably continue living with Ovan, and Ovan, Shino, and Aina can be the happy family Harald and Emma were denied.
Agreed on that final part. Ever since Fragment, The World was created for giving birth to the Ultimate AI; that is the objective of The World. Harald was just that insane and depressed when Emma died.
But Za Warudo has become so much more. It's now a place where people can come together and where new life besides the Ultimate AI can be born. Saying The World HAS to remain a womb for the Ultimate AI means that Mia's, Lycoris's, Rumor's, Rin's, Zefie's, and Tartarga's lives were ALL meaningless. And .hack's main theme is that no life is without value.