I believe they will use the Halo rings to defeat Cortana is some way or form. It will probably be four player co-op and after the backlash they got, a lot of missions should include the chief if they plan to do the same thing with two different stories. However I don’t think that will be the case. They might follow the Halo 3 formula and make Locke a secondary character sort of how they made the arbiter in Halo 3. In co-op the other two players would probably be Palmer and maybe some other elite. I don’t think we will play as Osiris or blue team again other than Locke or Chief. Maybe it will be 8 player co-op. That would be crazy(and highly unlikely). I am just throwing out theories at this point haha. What do you think?
For the record I don’t think Halo 5 was disappointing, I actually liked it. Was a bit too short(like halo 2) and needed at LEAST two more chief missions(back to the too short problem), but I still enjoyed it and am interested where the story is headed.