Ubisoft,
I understand that you wanted this game to be a multiplayer game, however this was not the case with previous versions of this game.
I have no problem with the game offering both variants ( multiplayer and solo ), but if you add a mission or DLC, please make it available to those of us who plays alone.
If these missions require a group of players at the same time to fulfill the mission, please add AI ( co-op or up to 3 additional players ) for those of us who don't play with others.
Try to understand that not all of us like to play with others at the same time. There are thousands of players ( probably more than teenagers ) who have a lot of responsibilities in our personal lives and a lot of things to do beside playing a game and it is very difficult to agree with our friends and match our personal schedules to be able to play together.
There is nothing more relaxing and rewarding that to play a game at our own pace, at the time we want for the time that we can play it.
This is a great game IMHO, but if you introduce AI at this point and continue adding missions as you have been doing it, I am pretty sure that a lot of people who still are undecided about either to buy it or not, will definitely jump in and not only them but the rest will be very happy.
Thanks