John's flash clone...
1) dies and is replaced with another clone that grows older.
2) dies and John makes return trips to Eridanus when he's older.
3) is listed as dead, but is secretly kept alive by technology.
4) is listed as dead, but is kept alive by his geas/luck.
5) is listed as dead, but kept alive by the Insurrectionists once they see how much the UNSC is watching him.

So... do we have a second Master Chief walking around the galaxy, fighting for the Insurrectionists? It would certainly make sense with the big points that are brought up in the audio drama. Are we getting the evil duplicate plot line?

Also of note, Chief's armor (aside from the recently-made hole) is surprisingly new-looking compared to the armor we saw in the first Halo 5 trailer. Why such a drastic difference if not to differentiate two nearly-identical characters?