Board Thread:Questions and Answers/@comment-26814288-20141003004846/@comment-190.39.203.65-20141017194207

Since Sheila was actually another version of FILSS and that she was also in the base the Director was hiding, I would assume that there was another copy somewhere or it's commonly used by UNSC.

Locus cannot be Maine, since it was already confirmed that he is a new character. He also wouldn't talk if he were Maine, since he got shot in the throat and became mute.

As to the reason the Chairman wanted Maine's helmet, he did mention that it was to be delivered to a trophy room, so he probably just wants it to put it up in a museum-like room.

I doubt any A.I. but Epsilon-Tex is in that helmet, considering that the other A.I. were implanted into their users. But I have an idea that the Meta could be brought back, at least in someone other than Maine, if Epsilon's memories of each A.I. were extracted or something like that.