I saw at the end of Marathon: Infinity it says "You are Destiny." http://www.youtube.com/watch?v=4f5vbzZyIjs at 2:40 here it is.
PS: I'm a fu.cking idiot, I don't know how to a hyperlink.
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It's not, isn't Destiny just a code name for the game? Also isn't 5% of Bungie working on a new Marathon?