The Prophets are in hiding, the Covenant has "broken," and it's usually one "Oracle" or monitor per installation, like a halo ring. I doubt we'll see a prophet in h6 but who knows. I didn't expect to see curtaba again.
Actually, I still want to hang Bungie for making Reach. The game sucked in all the departments that mattered to me. Halo 5 is okay but I just don't like 343 as a studio. They don't seem to know how to do simple things.