The release of Final Fantasy VII Remake is still a ways off, but director and producer Tetsuya Nomura is already talking about the potential of bringing back the companion games that launched as spin-offs of the main Final Fantasy VII story.
Gematsu is reporting that, during the The World Ends With You: Final Remix closed event that took place back on October 30th, Nomura took a couple of fan questions, one of which was centered around Before Crisis: Final Fantasy VII. Nomura didn't just address that particular game, but talked about the entire anthology of companion properties based on Final Fantasy VII, saying...
To put this into context, Nomura is also directing Kingdom Hearts III for Square Enix, in addition to working on Final Fantasy VII. The current development schedule sees Nomura putting Kingdom Hearts III at the top of the priority list, with the game scheduled to release at the end of January in 2019 for the Xbox One and PS4. Once the game is up and out then Nomura will return to work on Final Fantasy VII Remake.
The remake was announced back in 2015, and has been moving very slowly through development since then. It likely won't be complete until 2020 or 2021. However, it's interesting that he's actually considering something that could be done surrounding the compilation properties for Final Fantasy VII.
As explained by Getmasu, these are the projects that released after the initial game came out for PC and the PSX, such as Crisis Core: Final Fantasy VII and the very popular but story-opaque Final Fantasy VII: Advent Children, which was actually a CGI companion story that followed up on the events that took place after the initial story in VII concluded. It was Square's big return to CGI movies after The Spirits Within failed to gather an audience at the box office when it released during the turn of the century.
Given that Square has become a lot more comfortable with companion properties releasing alongside games, I can definitely see a UHD remaster of Advent Children making its way onto the market as a companion release alongside Final Fantasy VII Remake.
As for the PSP release of Crisis Core, or the PS2 outing of Dirge of Cerberus, those remain up in the air, but we'll see if Nomura will tackle them depending on if the remake sells well. Given that Final Fantasy is still extremely popular, it's completely possible that maybe Square Enix will tackle the other games.
For now we have to look forward to Kingdom Hearts III coming out in January, and then it's back to the waiting game for Final Fantasy VII Remake to make its way to home consoles.