What about hunt the truth?

So having watched all of the adds for halo 5, I was really excited for the whole “hunt the truth” story line. After playing the actual game, I have now found all of this to be false marketing. Not once does an event mentioned in the adverts happen in the full game.
The campaign is also left on a painful cliff hanger, and I really hope that it is not all of the story until Halo 6 in 3 more years.

So 343, will you be adding in more story? Like in halo 4 with Spartan Ops?

And also there are very few game modes in multiplayer, will new ones be added in? And how about firefight? Or forge?