So a few months back I saw a video which is a crossover between the E3 2006 Halo 3 trailer, and the E3 2012 Halo 5 trailer. It's really creepy how well the two match up. The video sent chills up my spine and was just fantastic.
Well it may be coincidence (which I highly doubt since 343 and Bungie have very little accidental actions) or it could be Fucking awesome referring to how much they have learned from H4 (which is a great starter game in my opinion)