Alright, I put a lot of thought into making this thread, because frankly I just didn't understand it. How could Bungie say, with confidence BTW, that Halo 3 was the "Stunning Conclusion to the Halo Trilogy"? It ended in another cliff-hanger! In addition, previous members of the Bungie staff had made the claim that the Marathon Security Android was in fact John-117. Coupled with the belief that Bungie's next project is most likely a next-gen Marathon game, we have 2 options of belief for the future of the halo franchise...
1)The Master Chief ends up on Onyx, where he and Cortana will meet up with the other Spartans and rescue them.
2) The Chief ends up as the Security Android from Marathon.
I don't what Bungie was thinking when they decided to make Halo 3's ending, but I for one didn't like how open-ended it was (for the last game in a trilogy).