Although, there are many different theories, some can be the correct and some wrong. What do you think?
SOME OF THE FAMOUS TOPICS ARE:
The Arbiter is comming back
Cortana being alive
The Flood is still here
The dictator is still alive
The librarian is still alive and helping.
If you are asking me what i think, i think the Arbiter is comming back to help master chief find something. The Flood is still here. Cortana is alive, but is used as a slave by the dictator, but is still hiding something from him. The dictator is indeed alive. The librarian i am not sure.
Post and vote what you think!!!