Final Fantasy VII: Advent Children

Final Fantasy: Advent Children is the CGI movie sequel to the hugely successful game Final Fantasy VII. Full details haven't emerged yet, but the trailer seems to include the characters from the game. Cloud and Sephiroth have had slight makeovers. Barret appears, as does a child currently believed to be Marlene. There are some silver haired men that bear more than a passing resemblance to Sephiroth. Could these be the clones? Also, there is a suspicious figure sitting hunched in a chair.