I think there are slightest chance that MC will have to face the banished on the arc…in the discover hope trailer we see that the ring was damaged and broken…at a part. IDK if there is any importance of zeta halo to chief but he wants to get that ring repaired or replaced then he might have to go to the arc and might have to fight the banished
The trailer might have nothing to do with the game. It’s possible we could be encountering the ark and the banish.