This could be a spoiler for some who missed it in the video so open at your own risk.
Is it her?So, tell me what you think you see?
Add to the fact that Josh Holmes is talking about the story being personal and showing this at the end.
Don’t get your hopes up she isn’t alive. 343 already said that john is going to be having hallucinations of her during the campaign. Look at that atmosphere that is a perfect setting to have some hallucination moments.
> 2615036569357638;1:
> This could be a spoiler for some who missed it in the video so open at your own risk.
>
>
> Is it her?
> So, tell me what you think you see?
>
> Add to the fact that Josh Holmes is talking about the story being personal and showing this at the end.
Dude this was confirmed as the ghost of Cortana months ago. 
It’s going to be like Cortana in Halo 3
Except this time Gravemind isn’t taunting him, chief is hallucinating her.
This is amazing.
Ugh.