: OR...

: Sure he needs a new AI buddy but maybe he wants MB to be his ancilla.

: Whatever happened to OB? Will it be MC + MB against D + OB?

Don't get me wrong, she was a very liked character, but I do hope she does not come back, as it would remove the impact of the event. At least personally, her death did have an effect on me, but regardless, since some are putting comic books as an example of death being impermanent, it's a reason on why should characters be only killed with full decision. Ironic considering I like DBZ, and the power of the titular balls to resurrect people is mercilessly parodied in Abridged.

My hope is that they stick to their guns in regards to her dying, and make it permanent, or something to reinforce that she is not coming back the way neither John nor us remembered her (Cortana stated that, even if Halsey had created another A.I., it wouldn't be her. You are not the same person you were five years ago). Besides... again, Origins II had a brief scene of Gravemind handing over a chip to the Master Chief. If that ends up being a prophecy, do you really trust the lovecraftian bastard to not have any underhanded motives to it?

As they mentioned in one of the ViDocs, the Master Chief was supposed to get knocked the hell out of his comfort zone. So without Cortana? He would be actually forced to evolve and adapt, especially so with all he went through after all four games. I don't know if he'd like to have another A.I. in his head after the bond he formed with Cortana, though.

The characters that have had a defining, on-screen death in Halo canon, and still dodged it, are a handful so far... Linda, Johnson, and 343 GS. Cole technically counts, but his was suggested before Nylund wrote his full story, in which he both died onscreen and most likely saved himself.