Overwatch
Everytime Blizzard releases one of their animated short films that explore the lore of Overwatch, fans start clamoring for a full-length feature film. While an Overwatch movie could be great a TV show would be fantastic. The series probably wouldn’t be able to handle same level of animation as the shorts for budget reasons. It might also have to switch from 3D to 2D animation but if Overwatch fans can pour over comics they can handle Reaper doing his death blossom on just one plane of animation.
There is no limit to the type of stories that an Overwatch series could tell. The show could cover everything from the organization’s origins to the “present day” adventures and even the individual backstories of the huge cast of characters. It is because of that huge cast that a TV show is required. An Overwatch movie would only appeal to fans of the game who have at least a passing familiarity with all the characters. An average movie goer would likely be completely lost. A TV show could take its time and make sure the audience knows their Widowmaker from their Soldier 76.