During Microsoft’s E3 conference, they started off the show with news of Halo 5: Guardians. Along with a brief multiplayer talk, they showed off a pretty lengthy gameplay trailer that delves into what we’ll be seeing in the upcoming game.
In the trailer (below), we are with Spartan Locke and a team of ODST hunting down Master Chief. As told to us by Microsoft, there will be drop in, drop out gameplay. You will be able to control two squads; Master Chief will have his own squad, and Spartan Locke will have the other.
https://www.youtube.com/watch?v=yx27jORxGhs