I just wanted to throw out my theory fro what I have seen an see what everyone thinks of it. For all of you who hate exo-suits I believe you are safe I don't think treyarch will bring them back. I actually believe that this game will take place before Black Ops 2 but after Black Ops 1. I believe we will go back to playing as Mason (which would be great) and I think the numbers are still stuck in his head as you play through the campaign. the snapchat videos teasers have people talking very calmly (specifically in the 2nd video I think) and the images are calm then all of the sudden switch to war images so I believe that is showing them try to calm Mason down. For all the people who played BO2 you know the campaign had multiple different endings which is another reason I believe this game will be before that time frame because if it is post it will have to contradict some of the endings to continue the story line.
This next part I have read about but not seen for myself:
Apparently on BO2 the took the 4 out of the AN-94 the B out of the Ballista and instead of saying +100 for a kill it says +00. if that is true you can put those together to get B41. B41 could be multiple things it was a type of helicopter used during WW2 and some after it is also a type of bomb the US created in the early 60's. (I personally think it is the bomb) so this bomb was made in the 60's roughly around BO1 timeline and the last (known) one was deactivated roughly around 1976 (which is about when I think this game will take place). So this would allow treyarch to go back to the BO1 story with the creation of this bomb along with the story of their choosing in the late 70's early 80's time frame. Another thing to know is the helicopter seen in the snapchat teasers did not enter active use in the US military until mid to late 70's

whatever happen I believe treyarch will make a good game, leave exo-suits out of it, and hopefully even the future. post your thoughts below let me know what you think. do you like this idea? why or why not.