Since all the prometheus and covenant stuff is in there, I would like to see a propper return to Fury 161 in the game. Maybe a possible hive made by the runner. At this point everything is possible due to the pathogen stuff included in the game. Why not let us roam the halls of the prisoncomplex too and find out the runner from 3 egg-morphed all the prisoners and was building a hive but never got to finish it.
Oh and bring back Danny Webb to speak some lines for Morse lol.
Sigh... this is never going to happen is it...