Exactly! Yes, Rinoa could have become super-evil and twisted because Squall died. But, nowhere in the game is it hinted, suggested or explicitly stated that Squall dies.
Same with the appearance. There are reasons why Rinoa's face looks like Ultimecia's, such as the dark magic. But, judging by the fact that Rinoa and Ultimecia are not very far apart age-wise, it seems unlikely that dark magic would have been able to change her to the extent that her face no longer looks alike.
So, R=U followers can go forth and bring out reasons why it is true, but at the end of the day, there is no evidence to back it up.
1) Ultimania explicitly states that sorceresses have a normal lifespan. The game explicitly states that Ultimecia lives many generations in the future. Then, how does Rinoa manage to
a) be alive in the future &
b) look, at most, 10 years older than she currently is.
2) Rinoa in the game is a upbeat, light-hearted, friendly girl. Ultimecia is an absolute loner. What evidence IN THE GAME or RELEVANT SUPPORTING MATERIALS suggests that such a change would occur?
3) Rinoa and Ultimecia do not look the same. Even with the constant use of dark magic, it would seem unlikely that Rinoa's entire facial structure would change to become Ultimecia's. Especially seeing that the age difference is not that large, and therefore Rinoa would not have been casting dark magic for a large portion of her life.
So, I'd like these questions answered. And I'd like them answered using in-game evidence, or from a relevant supporting document, such as Ultimania. Speculation does not count.




