If the next tier is FFVII, I don’t see them making Sephiroth the third fight; they’d have to make it the fourth fight (Sephiroth > Safer Sephiroth, following the Exdeath > Neo / Kefka > God Kefka pattern), and then make Omega a fifth fight, which I would be fine with. I just don’t think they’d be able to do vanilla Sephiroth without Safer and not receive backlash for it. I’d imagine Jenova would be the third fight—I wonder how they’ll do it? Her going through her various forms [LIFE, BIRTH, DEATH, SYNTHESIS] or just sticking with one—and the first two are a bit up in the air for me; I’m not sure which two they would choose for it.

Of course, they could end up not doing FFVII, but I doubt it considering FFVII Remake and the FanFest theme obviously being VII.