343 Industries is changing the multiplayer a bit by allowing users to play multiplayer mode with a “new breed” of Spartans called the Spartan IV. If you ask me, it’s a little random and the Spartan IV’s don’t look nearly as nice as Master Chief does. But I think they are using this breed of Spartans to tell the infamous story of Red vs. Blue.
343 Industries basically said that they have a pretty convincing reason as to why Red Spartans fight Blue Spartans. Maybe Spartan IV’s have something to do with that reasoning? I don’t know. But 343 Industries did say something rather interesting about the subject, “There are other parts to our multiplayer experience that will be coming in the future”.