It seems that this week's Rumour Engine teaser is have been found and revealed. Its from the Kill Team scenery seen in the video below.
via WhenDidVicesBecomeVirtues a day ago in the comment section of Faeit 212
I concur. Rooftop hatch in new Kill Team terrain. You can see it just above the Imperial building door at the 54 second mark, to the center right of the video.
The hinge and roundey thingamabob hatch wheel is visible.
Previously on Faeit 212