Exactly, you have absolutely no idea how Sephiroth sounds. The only game where Sephiroth had a voice actor was Kingdom Hearts, but I doubt they'd use Lance Bass.

I agree with Omecle, though. The man in the wheel chair is definately Rufus. In a trailer, the one from the Venice Film Festival I believe, the man was refered to as "Mr. President." The only presidents in the game were the Shinra presidents. Rufus was never shown dead, and it's possible that he could have survived the WEAPON'S attack.

Also, Rude is seen standing next to the man in the wheel chair. Now, first off, Rude is a Turk, a Shinra impolyee. Second, Rude always viewed Sephiroth as an enemy. It only makes sense that it's Rufus.

About not being sure of Sephiroth's death: he desintigrated into little pieces in a big ball of light thingie, how do you survive that?

I hate to be the guy who always complains, but I've got more. I can imagine the SE is going to treat Advent Children as a game as far as publishing it. That would mean that Europe would get the game a couple months after the US as their SE Europe will need to get it translated into all the necessary languages.

Just my two cents on the matters.