That trailer got me all hot and bothered.

Flashback, no one knows for sure what that thing in the end was. Many believe that it's Bahamut, since the silver-haired guy summoned him, but others believe that the monster is a WEAPON.

I don't know if this is a spoiler or not, since they said it in the trailer, but in case it is and you don't want a very, very minor detail spoiled, don't read on.

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When Kadaj goes into Aeris' church, he looks under the board and says, "Okaa-san!" which, in Japanese, means "mother." Following up with my belief that the Kadaj, Loz, and Yazu are all Sephiroth clones, I now believe that Jenovah is still alive. Why she's dormant at Aeris' church is the thing that I do not know.