I feel part of it will come down to fan demand and reception of Episode 1. Like I can see a mobile spin-off that will come out before the game's release, either something related to the Gold Saucer that can possibly be cross over to the main game when the time comes. What I can totally see them doing once this whole thing gets under way is releasing DLC style "episodes" starring each of the playable cast that will usually take place before the game's events. Barret and Tifa's stories would be about them getting to Midgard, Aerith's could be about her teen years being pursued by Tseng and the Turks, Red XIII's could be about his boyhood years up to him getting captured, Yuffie's is about her choosing to run away from home to start her thieving years,Caith Sith would be about Reeve testing out the tech and getting the orders to be a spy, Cid's would be about helping to build Rocket Town and end with the Rocket fiasco, and Vincent's could either be about his days as a Turk or do a funny story where kids wander into the Shin-Ra mansion and wake him up to play hide and seek or something. If these do well enough, they may add a Cloud chapter about his days as a lowly infantry soldier and how he met Zack, a story about Sephiroth and the birth of SOLDIER, and maybe a story about the Turks that shows you everything they were doing during the events of VII when they were off screen or not on vacation.

I can definitely see them doing a collection of the original Compilation similar to the Kingdom Hearts ones. So HD remasters of Crisis Core and Dirge of Cerberus, a "movie" version of Before Crisis, and then possibly Advent Children Complete and some of the other elements as part of it. Nomura has said he would be interested in doing something with the Compilation before the remake landed so possibly, but I also imagine they would have announced it by now, so maybe no.

For what I would like to see if they decided to expand anything? Probably nothing since they did such an awful job the first time. If I had to say anything, I wouldn't mind seeing an animated short a la Last Order style about Jenova arriving on the Planet and facing the Cetra. Maybe use a framing device of Ifalna telling Aerith or Professor Gast. My other desire would probably be telling a scaled back version of Crisis Core or preferably a scaled up version of Last Order that drops Genesis from the picture and simply have it focus on Zack running away home to join SOLDIER and moving up the ranks before Nibelheim, and then talking about his adventures with dragging a catatonic Cloud halfway across the world. Again, I feel a short film would be a better medium than trying to make it into a game cause that's when you have to add in silly elements to make it feel "epic" when that's not what anyone wanted or was expecting.