I have no proof of this, it's just speculation. Also, if Cortana stays dead, let's pretend it's another AI. (I'm just going to call it Cortana, hehe)
So, if Halo 5 is supposed to be a big deal, what could possibly be cooler than letting the player interact with Cortana via Kinect or headset much like Windows Phone users can have Cortana find them a pizza shop.
Is this a good idea?
[url]http://www.techradar.com/us/news/phone-and-communications/mobile-phones/cortana-everything-you-need-to-know-about-microsoft-s-siri-rival-1183607[/url]
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Penguins.