Why don't you lurk more? You literally only troll and it's getting old.
The brief version of the story is that the Final Fantasy: Spirits Within movie happened, Squaresoft went bankrupt and had to merge with Enix. Nobuo Uematsu and Hirnobu Sakaguchi (former President) left Square-Enix and formed Mistwalker. For what it's worth I loved Spirits Within, and it made 85 million box office, but the budget got too bloated for that to be profitable.
Saying FF7, 8, 9, or 10 was 300 pixel sprites with 10 colors is just ignorant. The team was considerably smaller that made those games, and has since become quite large for modern Square-Enix games. They were much more efficient in the late 90s / early 00s and in general the games were higher quality, even if they didn't look as graphically impressive as Lightning Returns.
My only guess as to why they're so inefficient now is bad direction, bad project management, and disorganization.
"An official website was opened for the tech demo where the demo can be viewed. The site was created with a survey asking fans' opinions on the movie, Agni's character and the world the movie takes place in. Although this implies "Agni" and this scenario may be used in future video game scenarios, there is no evidence suggesting that a game based on this material is in production."
All anyone would be able to offer you as an answer would be speculation.
Who knows how the survey went.