I'm not sure if these's new or not (at least it is for me) but its look like Blizzard has filed a new trademark under gaming-related categories for something called "Overwatch", here a full article about it of IGN
http://www.ign.com/articles/2014/04/...mark-overwatch
What do you think about it? assuming is a new game, how do you think it will be? what type of game?