A real joy of both Final Fantasy 7 Remake and Rebirth was seeing all the references to the universe as a whole. This tradition will continue in Final Fantasy 7 Revelation, according to director Naoki Hamaguchi, but he refuses to spoil any characters from across the original game's spin-offs that we might see.
"If I was to just come out now and say this character is in it, this character is in it would be a big surprise to people. So I can’t say that," he tells IGN. Boo! What he will say, though, is that an explicit goal here was to re-combine all the Final Fantasy 7 Compilation elements.