The Arbiter's Monologue and Halo 2 Anniversary
Interesting thing about the Arbiter's monologue as I thought about it, 343 is kind of rewriting some of the actions Master Chief did in the cutscenes with Blur's CGI versions. As the Arbiter said in the trailer, "To find him, you have to forget the stories.... Forget the legends.." In the trailer, the Master Chief did not detonate the bomb in the Carrier's engine room (Not sure if I am right on that) like in the original cutscene at the end of Cairo Station. So 343 is depicting their take on those events by adding newer cutscenes and tying them into any future Halo content.