WARNING: SPOILERS
Just before I get into it, just want to say I loved the game and really enjoyed the campaign. These are just a list of characters I’m surprised didn’t make an appearance, but perhaps will in a following game.
- Didact Despite being ‘contained’ at the end of Master Chief’s story in Halo: Escalation, I still thought he would make an appearance nonetheless. - Librarian I know her story arc is continuing in Halo: Escalation, but like the Didact I still thought she would make an appearance. - Dr. Glassman Perhaps he will die in the yet-to-be-released final Halo: Escalation comic? - Thorne Same as above ^. - Mendicant Bias I really thought he would, especially after watching the 2013 trailer which really seemed like the Chief was on the Lesser Arc, the last known place Mendicant is supposed to be. Perhaps the Chief will need his assistance to stop Cortana in Halo 6? - 'Rtas Vadam He would have been a solid companion for the Arbiter. Looking forward to his novel later this year. - Black-Box Not as much as the others, but still thought he would make an appearance toward the end (when you hear the other AI’s saying the will join Cortana. Imagine hearing BB’s English accent saying “I will join you, Cortana”). - Gravemind & Flood Again, not as much as the others, but still- perhaps he will make an appearance in Halo 6? To help stop Cortana? - Serin Osman I originally thought the game would have a stronger ONI presence, and was surprised not to see her. - The surviving Forerunners, including the IsoDidact. Long shot, but would have been awesome.
Have I missed anyone?