SPOILERS
I mean cortana's demise on halo4. Is she really dead?. I know you guys have better understanding of the halo universe than me.
Do you tuhink she will ever comeback?
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[quote] it's possible she'll spend her time in slipspace trying to make the Didact see reason and join humanity. [/quote] Impossible. The Didact is still alive. After the credits when it showed the monologue of Didact, it was him facing a court of other Forerunners. I have no idea where this might be, but he's still alive. As are other Forerunners. And Chief's out for bloody revenge.