Is Single Player Still Necessary?

Titanfall is having a tough time with marketing since it has no single player now this raises a question in my mind that the guys over on gamespot's podcast "GamePlay" had an interesting conversation about.
With the surge of Multiplayer that Call of Duty brought us more and more shooters are following the trend of focusing on Multiplayer and in some cases *cough* Destiny *cough* they attempt to merge single and multiplayer or focus solely on multiplayer and have shitty campaigns in the case of Call of Duty and Battlefield, the two most popular shooters. So we should have seen the moment someone was brave enough to break this meaningless cycle and do their own thing. I hope they continue to break cycles with next-gen and become something completely new.The video game future's looking bright that's a definite.