I hope the brutes return. I miss the brute shot and chopper. I can think of a plot that involves them. The key Halsey recieved reveals a significant piece of technology deep beneath the surface of the Brute's homeworld. The Brutes after being battered from the events of Halo 3, unify once again just like the Germans did after World War 1. It would turn into a cluster **** of Humans and good elites vs The Storm Covenant and Prometheans vs brutes and enslaved beasts from their planet. and maybe the flood come back.