We must stress that this probably means absolutely nothing. Uber Entertainment's Chandana Ekanayake snapped a pic of the chap in question (with permission) at a Seattle developer event last week.
'I asked him if it was OK to take the photo and he was cool with it. You never know with Valve,' tweeted Ekanayake, before seeming surprised at the heavy stir his pic caused.
With the VGAs just around the corner, could this be an early hint, or are Valve now just trolling their own fanbase? Being the cheeky pranksters that they are, it's probably the latter. Though we can still dream...