Nah, she's got a point- hence 'Advent Children'. It has a name.
I don't knwo much about 1 to 6, but 7 could be called something like 'Spirit of the Ancients' or 'Power of the Ancients' or something like that. Or, alternatively, 'Jenova's Legacy' or something else to do with Jenova.
I can't think of anything else.

[Off Topic: This is my first post in the gaming forums. Hope it's less dumb than I think it is.]