True, you did and yes, I guess they are assumptions but then is it REALLY that unlikely that they wouldn't happen? I mean, it is like Square giving us subtle hints that Squall is the son of Laguna, many never believed those two were related (and I am sure, even to this day some would still like to argue they are not) but the hints are there so of course if you stick the clues together you get son and father, but look at Zell and the library girl, hints had us that they could have something together (the scene in Balamb Hotel and the ending scene) which could or could not have happened (and I never said did just that it seems like they could of gotten together or at least got to know each other more.)
I also was meant to say that Quistis may have gone back, i mean, saving the world would be a great reason for her to become a teacher again, the knowledge she gained at saving the world would be a great reason to have her reinstated as a teacher, she now has real life knowledge on what she is teaching, she is able to become stronger and show better leadership skills because of being out there on the battlefield, she was let go because she 'didn't have the leadership skills' that were needed and what better way of learning of these leadership skills unless you are thrown into battle? Of course she could also have turned it down, having learnt there is more to life then just marking papers...
I can't see Edea and Cid giving up what they originally wanted to do, making Garden's around the world to help train those to fight sorceresses, true, without Ultimecia, there technically shouldn't be anymore sorceresses considering she was the one behind making those she wanted a sorceress but there is also the problem of rebels popping up and making trouble etc, even if the Gardens were no longer used just to train to fight sorceresses they would help train those who wish to protect the world from any on going threat that may pop up. Edea and Cid started out wanting to protect the world from sorceresses and yet now they can do one better, use their Garden's as a battle school to help train those to help protect from any threat.
Though it does beg the question, who DOES run the world? I mean, in X we have Spira and the 'capital' if you will, is Bevelle, anything and everything to do with law and order goes through them, FFVIII's world didn't really have that, each city/town had a president or mayor or whatever but no actual main 'United Nations' sort of thing.
Ultimecia is now dead which means that when she died would not the future she had planned gone with her? The only thing to look out for is if she has a younger self, that, I guess, COULD be a sequel's plot, seeking out and making sure the past self of Ultimecia doesn't end up becoming what she did but then would the future Ultimecia dying not erase any any and all knowledge about her? Meaning, if she does have a past self then wouldn't that be erased/'killed off'/whatever as well?
Whilst all good questions I would just like to point out that Griever was never real, he was made up by Squall as that is what Squall thought power was (the form of I should say) and was only made stronger by him and and thus was able to be turned into an actual boss because Squall thought so strongly of it that Ultimecia was able to bring it from his mind and throw it into battle so no, Griever was never an obtainable/useable GF, it was just all in Squalls mind. I guess Squall just needed something to believe in? He was thrown into an orphanage as a baby and then made to grow up learning how to fight, only fair he did have something to believe in right?
Of course that is just my interpretation of Griever, he was just always a figment of Squalls imagination, just something he wished to believe in.
Though with those questions, they seem a little redundant also, I mean, to get a game to answer them all? Not really sure we need that though to answer a few questions, I mean, the Deep Sea Deposit we have wiki for that answer:
The Deep Sea Research Center (海洋探査人工島, Kaiyou Tansa Jinkou Shima?, lit. " Artificial Ocean Research Island" ), also known as Battleship Island, is a hidden island located far out in the middle of the ocean, in the south-west corner of the world map of Final Fantasy VIII. It is an abandoned, half-sunken laboratory formerly used to research draw effects, however, other, less commonly known, research may have been going on.
Deep Sea Research Center can be found as early as disc 2 when Balamb Garden becomes mobile, but it cannot be entered. The party must wait until gaining access to Ragnarok to land on top of the structure to get inside.
And the 'less commonly known research' could of been GF research? We do find Bahamut and Eden there.
So some things have been, some what, answered, but others just seem a little pointless? I mean, take NORG, a lot probably would like to think he just died, he was a pain in the a**, he sat down in the basement dictating orders to Cid etc, most just would probably like to know he died and good riddance to him, only thing he was good for was the GF you drew from him.
Though the Laguna finally telling Squall and the world becoming hostile would be good questions to have answered, I must admit though as for Ellone...I thought it would of been just abnormal brain waves/patterns, she was just blessed with a 'special gift', like someone who has been placed on this earth to do one thing and one thing only and that is all their good at (like Mozart for example, he has a 'special gift' to make music and pretty much did nothing else but) just that since this is a fantasy game Ellone gets something more special. After all, Dr Odin did make a machine that was built from Ellone's powers so obviously it wasn't magic it was something to do with the inside of Ellone, like those who could be psychic or talk to the dead etc, that isn't magic it just is a power that they are able to use, like what I always believed was the case with Ellone, there isn't a reason exactly as to why one might be able to talk to the dead and another can't it is just something that some can do and others can't but in Ellone's case it is something only she can do and no one else can't
So yes, I guess a sequel could be done but it would have to have a good story, after X-2 (and one or two of the XIII games? ) Not many like this whole sequel thing.