[kupoartist]

lots of little infos coming through at the moment.
Gameforms have the following to say:

If you were afraid that the DVD movie Final Fantasy VII: Advent Children would only be a ten minute short, you're in luck. Square Enix has announced that the Advent Children will have a running time of about one hour, putting it in the same ballpark as many feature films.

not Spirits within length, but certainly of a reasonable length.

At a Tokyo Game Show press conference, Square Enix has officially stated that there will not be a video game remake of Final Fantasy VII. The possibility of such a remake has been a popular rumor for some time, but it looks like the only new FF7 content gamers can enjoy in the near future is the 2004 movie Final Fantasy VII: Advent Children.

and that puts to death all these FF7 remake rumours.

Also, here's a poster for the "Movie":

https://www.gameforms.com/news/ff7ac/media2/poster.jpg