I think that playable sanghelli would be cannon in multiplayer, Those still loyal to the Arbiter would likely wish to meet the Storm in battle, Therefore they would also need to train, and for a spartan, simulated combat against loyal elites would help the when they came against Jul Mdamas rebels in the field. And to be honest why make multiplayer canon, no one really cared why red was fighting blue. I love Sanghelli, i Love spartans too, But we sanghelli fight with honor, trained in the keeps of our kaidons, never knowing our fathers. i had a Sanghelli only clan in Halo Reach. So really there was no reason not to include the Elites in multiplayer, in fact there should have been a lot more content from previous games, such as the needle rifle, plasma rifle, the smg, Falcons, Hornets, Revants, the plasma launcher, the grenade launcher, Dual wielding. all of these should have been in halo 4, i was annoyed when some of these things where omitted from halo reach, but in my opinion Halo Reach was the better game in terms of fan service, and play ability. Halo 4 is a great game, but Halo Reach will probably always be my Favorite, followed by Halo 2. i believe that 343 made a grave error omitting the Elites from multiplayer.