Like I said earlier, we have a lot in the works, with Orisa and her story being the first release of the year. One of our goals for 2017 is to try to have more frequent story-related updates and content, so we’re very busy with that.
And a little something else is coming just around the corner, so look out for it! – Michael Chu (Lead Writer) [source]
This would mean all kinds of stories on different medias. We have yet to see a Story Mode in Overwatch, which would allow us to see more cutscenes and cinematic animations to build up a story of whatever character you are using.
Having all the old and new heroes given a Campaign of their own to expand their story would be a huge investment in time and effort by the developers and as it stands right now, the comics, animated shorts and “blogs” by (or about) different characters seems like the right path to go.
We could expect an animated short video about Mei, if the rumors are true. Which other hero would you like to see brought up next in terms of backstory and action sequences?