There are a few that show up in the cinematic trailer that I didn't see in the gameplay one, and wonder if they are covered at Blizzcon or elsewhere. Since I didn't recognize them, I don't know their names, so I'll call them "cigarette-cowboy," "ninjabot," "yellow-hazardsuit-guy," "robot-that-reminds-me-of-some-kind-of-Atlas-and-P-body-hybrid," "green-shirt-spikey-hair-guy" and "really-big-red-armored-thing." Are those guys explored in more detail anywhere?
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Specifically, THESE GUYS it shows about 30 seconds into the cinematic trailer (and in a few other stills after as well, as is definitely the case with the cowboy and robot-ninja. There are a few others in the background, as well, but they are blurred enough and their colors are "faded" enough that my assumption is that they are just there to kinda "fill out" the image... but those circled ones in particular have very clear and bright, detailed models but I have not seen more info on them either in that trailer (which only shows 4 characters anyway) or the gameplay trailer (which seems to show about 12).
(edited to include link)
(edited again to just attempt to include actual image)