Oh look! If you examine that image closely, you can see dozens and dozens of moons around Arrokoth. My taking this shot made Marc Buie (far right) very uncomfortable, since he didn't want any fake images to leak out ("So, we hear reports that MU69 is surrounded by more than 20 moons?!").
So here is the disclaimer: These are fake moons! John Spencer put them into the images, as an exercise so we could search for them and figure out exactly how sensitive our images and search algorithms were.
If anyone wants to publish this 'image' in Icarus, you've been warned!