Would Sephiroth have a chance to return?

[Wolf Kanno]

But his soul was "extinguished" by the Lifestream during the ending to the game... In a game that is as metaphysical as VII; I feel the soul being destroyed renders cells useless. Jenova could comeback (since there was no extinguishing of its soul) but Sephiroth was one of the few FF villains I felt was truly dead at the end of the game... The movie (and the Fan book) offer no real explanation to coincide with the game ending...

No, he was just weaken vastly.

Lol! Weaken my ass. But I guess we just have different opinions.

We saw Sephiroth transform into red Lifestream which was engulfed by the Green Lifestream and then saw a flash of light and the Lifestream left leaving no trace of the Red Lifestream. I don't know about you but this indicates to me that Sephiroth's soul was taken out. Granted, there is no real explanation for the ending in VII... Damn you EVA!!!!