Another change that this game will have compared to the original is that according to Square Enix's press release, the remake will be told across a "multi-part series, with each entry being its own unique experience". The reason behind it is that according to director Yoshinori Kitase, is that if they will remake Final Fantasy VII and having it remain as a single release, there will be some sections that will be shortened, removing the original experience players had with the original PSOne game.
Kitase stated, "If we took everything that’s in the original game and remade it at that quality, we couldn’t get it all on a single release." The sections we saw in the trailer, Sectors 1 & 8 are quite dense according to Kitase.
Final Fantasy VII Remake is coming first for the PS4. The release date and price of the game is yet to be announced.
[Sources: Square Enix NA YouTube Channel, Kotaku (link 2)]