via u/Transflection on the Overwatch subreddit:
For context: I got an email from Blizzard about taking an survey about Overwatch. The survey basically consisted of one of these pictures and the questions being "Do you understand the theme of the skins?", "Are the skins cohesive?", "Do you play the characters that are in the images?", and "Would you buy them?"
There were more concept art images, but these are the ones that we don't have in-game. I did have images like Bubble Bath Zen and Orisa concepts, S4 skins concepts, and others stuff that we already have that were asked of me.
Source
Imgur album