There are still four DLC characters to come, and here are the hints at who they are. Since then, very little information on the game has been released, but we now know that composer Nobuo Uematsu, who worked on the original game, will be returning for the remake.
The game is said to run the mobile version of Unreal Engine 4 and promises to leverage "Final Fantasy XI's compelling storyline, engaging content and impressive graphics while optimizing features for smartphone and mobile devices to create an immersive, responsive and dynamic experience for mobile users".
A screenshot showing an excerpt of the interview can be looked over right here, whereupon Kitase explains how he worked with Uematsu on several projects and how he thought Uematsu wouldn't be interested working on Final Fantasy VII Remake. Having the first out at the end of this year or sometime in 2019 with the two following parts out before 2023 sounds like a realistic timeline from our perspective, but we'll have to wait and see.
As you might recall, Uematsu is the composer behind various classic Final Fantasy games including the original FFVII.
While Final Fantasy 7 Remake's release may be far off, that doesn't mean Square Enix won't at least give fans an update on its development.
According to a report from The Lifestream (via Destructoid), there was an alleged conversation recorded during a closed door event at the Final Fantasy 30th Anniversary. The Final Fantasy series in itself is a major franchise for Square Enix, spanning over numerous games, spinoffs, and subseries.