I think Flower Moon meant that if SE did a movie, they should remake FFX-2's setting in the movie instead of making the movie work out like the game: enhance the storyline, add some more character development, think about good ways how to replace the battles with actio scenes without the movie having too much action to ruin the storyline etc.

I like Final Fantasy X-2 as a game, myself. The battle system was very fun, and you'd lose that feature if the game was turned into a movie since you can't be playing yourself anymore. The game didn't have that many FMVs or other big movie scenes either, so it'd be hard to make the game more cinematic. Besides, FFX-2 is a sequel. If it was turned into a movie, an average viewer might not get much of the story. It would be like with FFVII AC, pretty much only fans of the game would really like it. And considering I think FFVII is a lot more popular than FFX-2, the movie wouldn't have too big a fanbase to start with.