Final Fantasy VII: Advent Children Trailer

please can you ansewr me . if final fantasy 7 : advent children trailer is the continue of the old final fanatsy on ps 1 . so how did aeris get back to life ? and her death was absolitly sure . she dead after sferoth make a hole in her chist while she was pring . i know she is an anicent , but even an anicent don't have the abilaty to get back to life , do thay ? anyway can you please ansewr me cuz i'm so confusd . and the same thing to sferoth but his death was more sure than aeris cuz he just blow up in a quite way . and thank's .

The DVD ain't released yet, right?
So, how are we supposed to know?
We don't know much about the story either, and the best thing we could do is to wait for the DVD.

you'd better wait until the movie dont ruin it by yourself ;)