It's a new IP after all
I can appreciate that Blizzard doesn't go into anything half-cocked. I mean, look at Titanfall. It's a great shooter with well-crafted mechanics, but who gives a shit about that world and the characters in it? I couldn't recall anyone important if you paid me.
But with Overwatch, Blizzard's first new IP in a while, they're handling it differently. Not only is there a ton of art to flesh out the character's backstories, but there's also going to be a graphic novel (the art for McCree looks so badass!), and a series of animated shorts. You can check out a teaser for the first short below, coming later this month.
Exploring the World of Overwatch [Battle.net]