Below are two very low quality screenshots that were taken by a member of the StarCraft2forum.org community. The shots are believed to be of the Zerg Swarm Guardian, which until now, has not been seen. I want to note that these are obviously not screenshots from Blizzard or any other reputable member of the StarCraft community so it is not certain that the units in the images are actually the Swarm Guardian. That being said, they do look a lot like the old Guardian, and they don't look like any unit we've already seen.
This first screenshot shows what is believed to be the Swarm Guardian, circled in the upper right of the shot.
This second shot shows the Swarm Guardian again circled in the lower right, but also shows the old Guardian icon circled in the HUD.
